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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.

A247304 Expected value of trace(O)^(2n), where O is a 5 X 5 orthogonal matrix randomly selected according to Haar measure.

Table of values

n a(n)
1 1
2 3
3 15
4 105
5 945
6 10263
7 127699
8 1751685
9 25807445
10 401449271
11 6519160851
12 109656966853
13 1899821492925
14 33757439931675
15 613135175204151
16 11352879180474205
17 213825919244349885
18 4089023317563827335
19 79269914519539177315
20 1555788699527063688453

List of values

[1, 3, 15, 105, 945, 10263, 127699, 1751685, 25807445, 401449271, 6519160851, 109656966853, 1899821492925, 33757439931675, 613135175204151, 11352879180474205, 213825919244349885, 4089023317563827335, 79269914519539177315, 1555788699527063688453]

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

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