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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A256000 Numbers whose square can be written as sum of at least 3 consecutive triangular numbers in two ways.

Original entry on oeis.org

286, 826, 2739, 3971, 5698, 9196, 10166, 10697, 22990, 61006, 132795, 416790, 766480, 809380, 2396870, 2904434, 3459006, 3688802, 4518514, 11725659, 13111098, 13998608, 15709122, 22173027, 22365267, 23636272, 23823988, 32186742, 33630662, 33658710, 39502086, 46387924, 59101625, 62381858, 89841192
Offset: 1

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Author

Zak Seidov, May 06 2015

Keywords

Comments

Apparently there is an infinity of such numbers and there are no cases of 3 ways.

Examples

			4518514^2 = T(18801)+..+T(50546) = T(52361)+..+T(64316), where T(n) = A000217(n).

Crossrefs

Cf. A000217 (triangular numbers), A257274.

Extensions

a(10), a(20)-a(35) from Chai Wah Wu, Jan 21 2016
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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