Pyramidal number (English Wikipedia)

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

refsWebsite

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1books.google.com

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books.google.com

Beiler, Albert H. (1966), Recreations in the Theory of Numbers: The Queen of Mathematics Entertains, Courier Dover Publications, p. 194, ISBN 9780486210964.

oeis.org

Sloane, N. J. A. (ed.). "Sequence A002414". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.

wolfram.com

mathworld.wolfram.com

Weisstein, Eric W. "Pyramidal Number". MathWorld.