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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.

A165975 a(n) = sqrt( binomial(4n,0) * binomial(4n,1) * ... * binomial(4n,2n-1) ).

Table of values

n a(n)
0 1
1 2
2 112
3 261360
4 27983155200
5 143829595278720000
6 36441048083860298170220544
7 463109968103790656729135319264000000
8 298869615482782118878970689211942578421760000000

List of values

[1, 2, 112, 261360, 27983155200, 143829595278720000, 36441048083860298170220544, 463109968103790656729135319264000000, 298869615482782118878970689211942578421760000000]

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

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