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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.

A048902 Indices of heptagonal numbers (A000566) which are also hexagonal.

Table of values

n a(n)
1 1
2 221
3 71065
4 22882613
5 7368130225
6 2372515049741
7 763942477886281
8 245987105364332645
9 79207083984837225313
10 25504435056012222218045
11 8212348880951950716985081
12 2644350835231472118646977941

List of values

[1, 221, 71065, 22882613, 7368130225, 2372515049741, 763942477886281, 245987105364332645, 79207083984837225313, 25504435056012222218045, 8212348880951950716985081, 2644350835231472118646977941]

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

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