Happy number (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Happy number" in English language version.

Last modified: 09:58:38, 18 September 2026 (UTC)

Ref.Un. Ref.Website

Global rank English rank

55oeis.org

1,188^th place

866^th place

22arxiv.org

49^th place

31^st place

22utm.edu

1,830^th place

1,501^st place

11wolfram.com

1,091^st place

1,169^th place

11adsabs.harvard.edu

14^th place

9^th place

11uwaterloo.ca

3,649^th place

2,434^th place

adsabs.harvard.edu (Global: 14^th place; English: 9^th place)

ui.adsabs.harvard.edu

Gilmer, Justin (2013). "On the Density of Happy Numbers". Integers. 13 (2): 2. arXiv:1110.3836. Bibcode:2011arXiv1110.3836G.

arxiv.org (Global: 49^th place; English: 31^st place)

Gilmer, Justin (2013). "On the Density of Happy Numbers". Integers. 13 (2): 2. arXiv:1110.3836. Bibcode:2011arXiv1110.3836G.
Pan, Hao (2006). "Consecutive Happy Numbers". arXiv:math/0607213.

oeis.org (Global: 1,188^th place; English: 866^th place)

Sloane, N. J. A. (ed.). "Sequence A161872 (Smallest unhappy number in base n)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
Sloane, N. J. A. (ed.). "Sequence A035502 (Lower of pair of consecutive happy numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 8 April 2011.
Sloane, N. J. A. (ed.). "Sequence A072494 (First of triples of consecutive happy numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 8 April 2011.
Sloane, N. J. A. (ed.). "Sequence A055629 (Beginning of first run of at least n consecutive happy numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
Sloane, N. J. A. (ed.). "Sequence A068571 (Number of happy numbers <= 10^n)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.

utm.edu (Global: 1,830^th place; English: 1,501^st place)

primes.utm.edu

Chris K. Caldwell. "The Prime Database: 10¹⁵⁰⁰⁰⁶ + 7426247 · 10⁷⁵⁰⁰⁰ + 1". utm.edu.
Chris K. Caldwell. "The Prime Database: 2^42643801 − 1". utm.edu.

uwaterloo.ca (Global: 3,649^th place; English: 2,434^th place)

cs.uwaterloo.ca

Styer, Robert (2010). "Smallest Examples of Strings of Consecutive Happy Numbers". Journal of Integer Sequences. 13: 5. 10.6.3 – via University of Waterloo. Cited in Sloane "A055629".

wolfram.com (Global: 1,091^st place; English: 1,169^th place)

mathworld.wolfram.com

"Sad Number". Wolfram Research, Inc. Retrieved 16 September 2009.

Happy number (English Wikipedia)

adsabs.harvard.edu (Global: 14th place; English: 9th place)

ui.adsabs.harvard.edu

arxiv.org (Global: 49th place; English: 31st place)

oeis.org (Global: 1,188th place; English: 866th place)

utm.edu (Global: 1,830th place; English: 1,501st place)