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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.

A203516 a(n) = Product_{1 <= i < j <= n} 2*(i+j-1).

Table of values

n a(n)
1 1
2 4
3 192
4 184320
5 4954521600
6 4794391461888000
7 204135216112950312960000
8 451965950843675288237663846400000
9 60040562704967329457107799785403842560000000
10 542366306792798635131534558788357929673196306432000000000

List of values

[1, 4, 192, 184320, 4954521600, 4794391461888000, 204135216112950312960000, 451965950843675288237663846400000, 60040562704967329457107799785403842560000000, 542366306792798635131534558788357929673196306432000000000]

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

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