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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.

A253714 Indices of hexagonal numbers (A000384) which are also centered heptagonal numbers (A069099).

Table of values

n a(n)
1 1
2 2857
3 45529
4 184300369
5 2937241777
6 11889953986681
7 189493215939721
8 767068491312421537
9 12224965330197902689
10 49486656636639609035209
11 788681413122894278122297
12 3192582165489099245985035761
13 50880992673985436128583949841

List of values

[1, 2857, 45529, 184300369, 2937241777, 11889953986681, 189493215939721, 767068491312421537, 12224965330197902689, 49486656636639609035209, 788681413122894278122297, 3192582165489099245985035761, 50880992673985436128583949841]

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

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