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.

A287396 a(n) = (7*(csc(2*Pi/7))^2)^n + (7*(csc(4*Pi/7))^2)^n + (7*(csc(8*Pi/7))^2)^n.

Table of values

n a(n)
0 3
1 56
2 1568
3 53312
4 1931776
5 71300096
6 2645479424
7 98305622016
8 3654656065536
9 135885355483136
10 5052615982317568
11 187873377732526080
12 6985794697679601664
13 259756778648305139712
14 9658687473893481906176
15 359144636249686988029952
16 13354285908291066433372160

List of values

[3, 56, 1568, 53312, 1931776, 71300096, 2645479424, 98305622016, 3654656065536, 135885355483136, 5052615982317568, 187873377732526080, 6985794697679601664, 259756778648305139712, 9658687473893481906176, 359144636249686988029952, 13354285908291066433372160]

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

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