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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.

A119582 a(n) = (n^2+n^3)*(binomial(2*n,n))/2.

Table of values

n a(n)
0 0
1 2
2 36
3 360
4 2800
5 18900
6 116424
7 672672
8 3706560
9 19691100
10 101615800
11 512143632
12 2531090016
13 12303909800
14 58971402000
15 279211536000
16 1307950928640
17 6069709778220
18 27933266453400
19 127596402318000
20 578955421044000
21 2611088948908440
22 11711414832065520
23 52265818258804800

List of values

[0, 2, 36, 360, 2800, 18900, 116424, 672672, 3706560, 19691100, 101615800, 512143632, 2531090016, 12303909800, 58971402000, 279211536000, 1307950928640, 6069709778220, 27933266453400, 127596402318000, 578955421044000, 2611088948908440, 11711414832065520, 52265818258804800]

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

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