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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.

A172010 a(n) = 2*A142458(2*n, n)/(n+1).

Table of values

n a(n)
1 1
2 26
3 2741
4 683870
5 315704418
6 234725594388
7 257237392999893
8 390832857108454838
9 787178784737043042806
10 2031210797603911366282796
11 6536955866068372922068141666
12 25676217636579568989377656129516
13 120915166829869713032692550819662756
14 672580820552232143302651758669053327784

List of values

[1, 26, 2741, 683870, 315704418, 234725594388, 257237392999893, 390832857108454838, 787178784737043042806, 2031210797603911366282796, 6536955866068372922068141666, 25676217636579568989377656129516, 120915166829869713032692550819662756, 672580820552232143302651758669053327784]

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

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