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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.

A355256 a(n) is the number of n-th order n X n magic arrays composed of the numbers from 1 to n^2 in which each 2 X 2 subsquare has the same sum, counted up to rotations and reflections.

Table of values

n a(n)
1 1
2 3
3 47
4 2544
5 6480
6 5510592

List of values

[1, 3, 47, 2544, 6480, 5510592]

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

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