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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.

A143669 a(n) = binomial((n+1)^2, n) / (n+1)^2.

Table of values

n a(n)
0 1
1 1
2 4
3 35
4 506
5 10472
6 285384
7 9706503
8 397089550
9 19022318084
10 1045659267016
11 64924369564353
12 4496010926381352
13 343688726144945040
14 28753733905585301136
15 2613784129155164386575
16 256569498889138342791510
17 27050758656206146528056236

List of values

[1, 1, 4, 35, 506, 10472, 285384, 9706503, 397089550, 19022318084, 1045659267016, 64924369564353, 4496010926381352, 343688726144945040, 28753733905585301136, 2613784129155164386575, 256569498889138342791510, 27050758656206146528056236]

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

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