cp's OEIS Frontend

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.

A340563 a(n) = sqrt( Product_{1<=j, k<=n-1} (4*sin(j*Pi/n)^2 + 4*cos(k*Pi/n)^2) ).

Table of values

n a(n)
0 1
1 1
2 2
3 16
4 384
5 30976
6 7741440
7 6369316864
8 16435095011328
9 138915523039657984
10 3696387867279360000000
11 321533678904455375050768384
12 88192375153215003517412966400000
13 78996127242669742603293261855977373696
14 223311937686075869460797609709638544686841856

List of values

[1, 1, 2, 16, 384, 30976, 7741440, 6369316864, 16435095011328, 138915523039657984, 3696387867279360000000, 321533678904455375050768384, 88192375153215003517412966400000, 78996127242669742603293261855977373696, 223311937686075869460797609709638544686841856]

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

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