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.

A253675 Centered triangular numbers (A005448) which are also centered octagonal numbers (A016754).

Table of values

n a(n)
1 1
2 361
3 6241
4 3463321
5 59923081
6 33254804881
7 575381414521
8 319312633001041
9 5524812282304561
10 3066039868821187801
11 53049246959306977201
12 29440114501108412261161
13 509378863778453312776441
14 282683976373603105710477121
15 4891055796951461749972406281

List of values

[1, 361, 6241, 3463321, 59923081, 33254804881, 575381414521, 319312633001041, 5524812282304561, 3066039868821187801, 53049246959306977201, 29440114501108412261161, 509378863778453312776441, 282683976373603105710477121, 4891055796951461749972406281]

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

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