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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.

A251867 Numbers n such that n^2 + (n+1)^2 is equal to the sum of the hexagonal numbers H(m) and H(m+1) for some m.

Table of values

n a(n)
1 0
2 14
3 492
4 16730
5 568344
6 19306982
7 655869060
8 22280241074
9 756872327472
10 25711378892990
11 873430010034204
12 29670908962269962
13 1007937474707144520
14 34240203231080643734
15 1163158972382034742452
16 39513164857758100599650
17 1342284446191393385645664

List of values

[0, 14, 492, 16730, 568344, 19306982, 655869060, 22280241074, 756872327472, 25711378892990, 873430010034204, 29670908962269962, 1007937474707144520, 34240203231080643734, 1163158972382034742452, 39513164857758100599650, 1342284446191393385645664]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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