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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.

A259078 Heptagonal numbers (A000566) that are other heptagonal numbers divided by 2.

Table of values

n a(n)
1 6426
2 9875715583923
3 15176968126834688342280
4 23323916081375479417207129139097
5 35844119643974208514403771705730853759974
6 55085128439364942192092971212729781713850848998511
7 84654649223375294035879228202426981713600292140166013136308

List of values

[6426, 9875715583923, 15176968126834688342280, 23323916081375479417207129139097, 35844119643974208514403771705730853759974, 55085128439364942192092971212729781713850848998511, 84654649223375294035879228202426981713600292140166013136308]

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

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