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.

A052503 Number of permutations sigma of [2n] without fixed points such that sigma^4 = Id.

Table of values

n a(n)
0 1
1 1
2 9
3 105
4 2625
5 76545
6 3440745
7 176080905
8 12034447425
9 922995698625
10 87505195602825
11 9203114782686825
12 1141501848477415425
13 155540530213013570625
14 24232951756530007115625
15 4112826185329479728735625
16 781060320618828163499210625

List of values

[1, 1, 9, 105, 2625, 76545, 3440745, 176080905, 12034447425, 922995698625, 87505195602825, 9203114782686825, 1141501848477415425, 155540530213013570625, 24232951756530007115625, 4112826185329479728735625, 781060320618828163499210625]

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

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