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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.

A353252 Expansion of Sum_{k>=0} x^k * Product_{j=0..k-1} (j + 2 * x).

Table of values

n a(n)
0 1
1 0
2 2
3 2
4 8
5 24
6 100
7 488
8 2832
9 19096
10 147296
11 1281392
12 12422864
13 132870368
14 1554525152
15 19750621216
16 270817685568
17 3986140113792
18 62686410981696
19 1048946532137216
20 18608550117641728
21 348854564104019072
22 6891109834644748032
23 143058034748452036352

List of values

[1, 0, 2, 2, 8, 24, 100, 488, 2832, 19096, 147296, 1281392, 12422864, 132870368, 1554525152, 19750621216, 270817685568, 3986140113792, 62686410981696, 1048946532137216, 18608550117641728, 348854564104019072, 6891109834644748032, 143058034748452036352]

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

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