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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.

A217360 a(n) = 2^n*binomial(4*n, n)/(3*n+1).

Table of values

n a(n)
0 1
1 2
2 16
3 176
4 2240
5 31008
6 453376
7 6888960
8 107707392
9 1721477120
10 28000141312
11 461964898304
12 7712495058944
13 130050777006080
14 2211737871974400
15 37892693797109760
16 653389823437701120
17 11330548232319664128
18 197475886172892823552

List of values

[1, 2, 16, 176, 2240, 31008, 453376, 6888960, 107707392, 1721477120, 28000141312, 461964898304, 7712495058944, 130050777006080, 2211737871974400, 37892693797109760, 653389823437701120, 11330548232319664128, 197475886172892823552]

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

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