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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.

A283033 Number of inequivalent 5 X 5 matrices with entries in {1,2,3,...,n} up to rotations and reflections.

Table of values

n a(n)
0 0
1 1
2 4211744
3 105918450471
4 140738033618944
5 37252918396015625
6 3553786240466361696
7 167633579843887699759
8 4722366500530551259136
9 89737248564744874067889
10 1250000000501250002500000
11 13543382431328404683826391
12 119245270812803151147085824

List of values

[0, 1, 4211744, 105918450471, 140738033618944, 37252918396015625, 3553786240466361696, 167633579843887699759, 4722366500530551259136, 89737248564744874067889, 1250000000501250002500000, 13543382431328404683826391, 119245270812803151147085824]

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

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