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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.

A340182 a(n) = Product_{1<=j,k,m<=n} (4*cos(j*Pi/(2*n+1))^2 + 4*cos(k*Pi/(2*n+1))^2 + 4*cos(m*Pi/(2*n+1))^2).

Table of values

n a(n)
0 1
1 3
2 61731
3 220157391087140625
4 3109768877542258728107559478225309328087616

List of values

[1, 3, 61731, 220157391087140625, 3109768877542258728107559478225309328087616]

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

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