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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.

A203521 a(n) = Product_{1 <= i < j <= n} (prime(i) + prime(j)).

Table of values

n a(n)
0 1
1 1
2 5
3 280
4 302400
5 15850598400
6 32867800842240000
7 5539460271229108224000000
8 55190934927547677562078494720000000
9 61965661927377302817151474643396198400000000000
10 14512955968670787590604912803260278557019929051136000000000000

List of values

[1, 1, 5, 280, 302400, 15850598400, 32867800842240000, 5539460271229108224000000, 55190934927547677562078494720000000, 61965661927377302817151474643396198400000000000, 14512955968670787590604912803260278557019929051136000000000000]

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

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