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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.

A333593 a(n) = Sum_{k = 0..n} (-1)^(n + k)*binomial(n + k - 1, k)^2.

Table of values

n a(n)
0 1
1 0
2 6
3 72
4 910
5 12000
6 163086
7 2266544
8 32043726
9 459167040
10 6651400756
11 97214919648
12 1431514320886
13 21213380196736
14 316072831033350
15 4731683468079072
16 71128104013487310
17 1073134004384407680
18 16243463355081280080
19 246585461357885877920

List of values

[1, 0, 6, 72, 910, 12000, 163086, 2266544, 32043726, 459167040, 6651400756, 97214919648, 1431514320886, 21213380196736, 316072831033350, 4731683468079072, 71128104013487310, 1073134004384407680, 16243463355081280080, 246585461357885877920]

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

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