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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.

A134805 Denominator of Sum_{i=1..n} 1/(i^2*binomial(2*i,i)).

Table of values

n a(n)
0 1
1 2
2 24
3 360
4 2016
5 16800
6 237600
7 151351200
8 605404800
9 30875644800
10 53330659200
11 6453009763200
12 11416863427200
13 1929449919196800
14 1929449919196800
15 93256746094512000
16 680225677395264000
17 196585220767231296000
18 93119315100267456000
19 1243794691794272409792000

List of values

[1, 2, 24, 360, 2016, 16800, 237600, 151351200, 605404800, 30875644800, 53330659200, 6453009763200, 11416863427200, 1929449919196800, 1929449919196800, 93256746094512000, 680225677395264000, 196585220767231296000, 93119315100267456000, 1243794691794272409792000]

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

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