1729 (liczba) (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "1729 (liczba)" in Polish language version.

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742^nd place

1,271^st place

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Taxicab, taxi-cab or Hardy-Ramanujan numbers: the smallest number that is the sum of 2 positive integral cubes in n ways.. The On-Line Encyclopedia of Integer Sequences. [dostęp 2017-03-18]. (ang.).
Niven (or Harshad) numbers: numbers that are divisible by the sum of their digits.. The On-Line Encyclopedia of Integer Sequences. [dostęp 2017-03-18]. (ang.).
Carmichael numbers: composite numbers n such that a^(n-1) == 1 (mod n) for every a coprime to n.. The On-Line Encyclopedia of Integer Sequences. [dostęp 2017-03-18]. (ang.).
Proth numbers: of the form k*2^m + 1 for k odd, m >= 1 and 2^m > k.. The On-Line Encyclopedia of Integer Sequences. [dostęp 2017-03-18]. (ang.).
Zeisel numbers.. The On-Line Encyclopedia of Integer Sequences. [dostęp 2017-03-18]. (ang.).
Sphenic numbers: products of 3 distinct primes.. The On-Line Encyclopedia of Integer Sequences. [dostęp 2017-03-18]. (ang.).
Squarefree numbers: numbers that are not divisible by a square greater than 1.. The On-Line Encyclopedia of Integer Sequences. [dostęp 2017-03-18]. (ang.).
Numbers n such that n = digit_sum(n)*R(digit_sum(n)) where digit_sum is the sum of digits and R is the digit reversal.. The On-Line Encyclopedia of Integer Sequences. [dostęp 2017-03-18]. (ang.).