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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.

A147304 a(n) = Sum_{k=1..prime(n)^2-1} binomial(2k,k).

Table of values

n a(n)
1 28
2 17576
3 43308802158650
4 8610524734277600186228691452
5 121374542758943982922417964798154019940274699584207321286055873543631298
6 8126392396649531937838689708830356413772063825711016912849229977138431439363305375418692100492504264

List of values

[28, 17576, 43308802158650, 8610524734277600186228691452, 121374542758943982922417964798154019940274699584207321286055873543631298, 8126392396649531937838689708830356413772063825711016912849229977138431439363305375418692100492504264]

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

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