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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.

A060842 a(n) = (binomial(2*p,p)-2)/p^2 where p = prime(n).

Table of values

n a(n)
1 1
2 2
3 10
4 70
5 5830
6 61542
7 8074762
8 97909318
9 15564141262
10 35751803209918
11 484316704740126
12 1275478863649106070
13 252697549582862416198
14 3589806968644540547902
15 735944382229592689247902
16 2233009988826006212007799102
17 6997040996166222103946741339278
18 103007775714125517422789307317230

List of values

[1, 2, 10, 70, 5830, 61542, 8074762, 97909318, 15564141262, 35751803209918, 484316704740126, 1275478863649106070, 252697549582862416198, 3589806968644540547902, 735944382229592689247902, 2233009988826006212007799102, 6997040996166222103946741339278, 103007775714125517422789307317230]

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

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