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.

A143583 Apéry-like numbers: a(n) = (1/C(2n,n))*Sum_{k=0..n} C(2k,k)*C(4k,2k)*C(2n-2k,n-k)*C(4n-4k,2n-2k).

Table of values

n a(n)
0 1
1 12
2 164
3 2352
4 34596
5 516912
6 7806224
7 118803648
8 1818757924
9 27972399792
10 431824158864
11 6686855325888
12 103814819552016
13 1615296581684928
14 25180747436810304
15 393189646497706752
16 6148451986328464164
17 96269310864931432368
18 1509065592479205772304

List of values

[1, 12, 164, 2352, 34596, 516912, 7806224, 118803648, 1818757924, 27972399792, 431824158864, 6686855325888, 103814819552016, 1615296581684928, 25180747436810304, 393189646497706752, 6148451986328464164, 96269310864931432368, 1509065592479205772304]

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

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