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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.

A215615 From Wendt's determinant compute sqrt(abs(A048954(n))/(2^n - 1)).

Table of values

n a(n)
1 1
2 1
3 2
4 5
5 11
6 0
7 232
8 2295
9 26714
10 453871
11 7053157
12 0
13 7715707299
14 545539395584
15 42297694603648
16 4883188189089105
17 531361846217471443
18 0
19 28649272821614715410221
20 14214363393075742724609375
21 7526219790642312236217153392
22 5968603205606800870499639536231

List of values

[1, 1, 2, 5, 11, 0, 232, 2295, 26714, 453871, 7053157, 0, 7715707299, 545539395584, 42297694603648, 4883188189089105, 531361846217471443, 0, 28649272821614715410221, 14214363393075742724609375, 7526219790642312236217153392, 5968603205606800870499639536231]

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

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