cp's OEIS Frontend

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.

A253447 Indices of centered octagonal numbers (A016754) which are also centered heptagonal numbers (A069099).

Table of values

n a(n)
1 1
2 15
3 435
4 13021
5 390181
6 11692395
7 350381655
8 10499757241
9 314642335561
10 9428770309575
11 282548466951675
12 8467025238240661
13 253728208680268141
14 7603379235169803555
15 227847648846413838495
16 6827826086157245351281
17 204606934935870946699921

List of values

[1, 15, 435, 13021, 390181, 11692395, 350381655, 10499757241, 314642335561, 9428770309575, 282548466951675, 8467025238240661, 253728208680268141, 7603379235169803555, 227847648846413838495, 6827826086157245351281, 204606934935870946699921]

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

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