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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.

A251924 Numbers n such that the sum of the triangular numbers T(n) and T(n+1) is equal to a hexagonal number H(m) for some m.

Table of values

n a(n)
1 0
2 34
3 1188
4 40390
5 1372104
6 46611178
7 1583407980
8 53789260174
9 1827251437968
10 62072759630770
11 2108646576008244
12 71631910824649558
13 2433376321462076760
14 82663163018885960314
15 2808114166320660573948
16 95393218491883573553950
17 3240561314557720840260384

List of values

[0, 34, 1188, 40390, 1372104, 46611178, 1583407980, 53789260174, 1827251437968, 62072759630770, 2108646576008244, 71631910824649558, 2433376321462076760, 82663163018885960314, 2808114166320660573948, 95393218491883573553950, 3240561314557720840260384]

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

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