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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.

A253285 a(n) = RF(n+1,3)*C(n+2,n-1), where RF(a,n) is the rising factorial.

Table of values

n a(n)
0 0
1 24
2 240
3 1200
4 4200
5 11760
6 28224
7 60480
8 118800
9 217800
10 377520
11 624624
12 993720
13 1528800
14 2284800
15 3329280
16 4744224
17 6627960
18 9097200
19 12289200
20 16364040
21 21507024
22 27931200
23 35880000
24 45630000
25 57493800
26 71823024
27 89011440
28 109498200
29 133771200
30 162370560

List of values

[0, 24, 240, 1200, 4200, 11760, 28224, 60480, 118800, 217800, 377520, 624624, 993720, 1528800, 2284800, 3329280, 4744224, 6627960, 9097200, 12289200, 16364040, 21507024, 27931200, 35880000, 45630000, 57493800, 71823024, 89011440, 109498200, 133771200, 162370560]

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

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