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.

A062883 (1-2*cos(1/11*Pi))^n+(1+2*cos(2/11*Pi))^n+(1-2*cos(3/11*Pi))^n+(1+2*cos(4/11*Pi))^n+(1-2*cos(5/11*Pi))^n.

Table of values

n a(n)
1 4
2 12
3 25
4 64
5 159
6 411
7 1068
8 2808
9 7423
10 19717
11 52529
12 140251
13 375015
14 1003770
15 2688570
16 7204696
17 19313075
18 51782613
19 138861732
20 372414289
21 998851473
22 2679146955
23 7186319506
24 19276417059
25 51707411684
26 138702360471

List of values

[4, 12, 25, 64, 159, 411, 1068, 2808, 7423, 19717, 52529, 140251, 375015, 1003770, 2688570, 7204696, 19313075, 51782613, 138861732, 372414289, 998851473, 2679146955, 7186319506, 19276417059, 51707411684, 138702360471]

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

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