cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A225789 Least triangular number of the form p*triangular(n) where p is a prime number, or 0 if no such triangular number exists.

Original entry on oeis.org

0, 3, 6, 66, 190, 45, 105, 0, 2556, 1035, 5995, 8646, 1326, 16471, 210, 28680, 36856, 46971, 0, 72010, 630, 3003, 32131, 16836, 20100, 52975, 246051, 17766, 329266, 42195, 17205, 491536, 0, 17391, 0, 49770, 55278, 0, 30381, 5460, 0, 164451, 33411, 0, 4950, 85905, 584821
Offset: 0

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Author

Alex Ratushnyak, May 16 2013

Keywords

Crossrefs

Formula

a(n) = A225787(n) * A000217(n).

Extensions

a(28) corrected by Mansour Qahwaji, Jul 25 2019
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