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.

A253460 Indices of centered heptagonal numbers (A069099) which are also centered square numbers (A001844).

Table of values

n a(n)
1 1
2 16
3 112
4 3937
5 28321
6 999856
7 7193296
8 253959361
9 1827068737
10 64504677712
11 464068265776
12 16383934179361
13 117871512438241
14 4161454776879856
15 29938900091047312
16 1056993129393303937
17 7604362751613578881
18 268472093411122320016
19 1931478200009757988336

List of values

[1, 16, 112, 3937, 28321, 999856, 7193296, 253959361, 1827068737, 64504677712, 464068265776, 16383934179361, 117871512438241, 4161454776879856, 29938900091047312, 1056993129393303937, 7604362751613578881, 268472093411122320016, 1931478200009757988336]

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

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