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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.

A355119 a(n) is the number of order-n magic triangles composed of the numbers from 1 to n(n+1)/2 in which the sum of the k-th row and the (n-k+1)-st row is the same for all k and all three directions, counted up to rotations and reflections.

Table of values

n a(n)
1 1
2 1
3 0
4 0
5 7584
6 5546793216

List of values

[1, 1, 0, 0, 7584, 5546793216]

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

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