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.

A275546 a(n) = (tan(1*Pi/11))^(2*n) + (tan(2*Pi/11))^(2*n) + (tan(3*Pi/11))^(2*n) + (tan(4*Pi/11))^(2*n) + (tan(5*Pi/11))^(2*n).

Table of values

n a(n)
0 5
1 55
2 2365
3 113311
4 5476405
5 264893255
6 12813875437
7 619859803695
8 29985188632421
9 1450508002869079
10 70167091762786205
11 3394273427239643839
12 164195092176119969173
13 7942798031108524622951
14 384226104001681151724877
15 18586611219134532494467151
16 899111520569015285343455941
17 43493755633501102693569684087
18 2103973462501643822799172235773

List of values

[5, 55, 2365, 113311, 5476405, 264893255, 12813875437, 619859803695, 29985188632421, 1450508002869079, 70167091762786205, 3394273427239643839, 164195092176119969173, 7942798031108524622951, 384226104001681151724877, 18586611219134532494467151, 899111520569015285343455941, 43493755633501102693569684087, 2103973462501643822799172235773]

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

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