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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.

A275607 a(n) = 2*12^n*Gamma(n+1/2)*(n+1)/(sqrt(Pi)*Gamma(n+3)).

Table of values

n a(n)
0 1
1 4
2 27
3 216
4 1890
5 17496
6 168399
7 1667952
8 16888014
9 173997720
10 1818276174
11 19225409616
12 205299909828
13 2210922105840
14 23984556773175
15 261854925711840
16 2874948871877910
17 31722346066169880
18 351589335566716170
19 3912422681494285200
20 43694647856506630620
21 489597172255515289680

List of values

[1, 4, 27, 216, 1890, 17496, 168399, 1667952, 16888014, 173997720, 1818276174, 19225409616, 205299909828, 2210922105840, 23984556773175, 261854925711840, 2874948871877910, 31722346066169880, 351589335566716170, 3912422681494285200, 43694647856506630620, 489597172255515289680]

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

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