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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.

A110058 Number of nonnegative integer matrices of order n for which all row and column sums equal n.

Table of values

n a(n)
0 1
1 1
2 3
3 55
4 10147
5 22069251
6 602351808741
7 215717608046511873
8 1046591482728407939338275
9 70417932475495769964322670258947
10 66880713903767740581650957184096513655153
11 909176713758393122455793478657031533216492953328933
12 178876969166665269546249744608783223036842010760723370462856181
13 514016665650183402309555825250370336139392333285719205357202846243695510965

List of values

[1, 1, 3, 55, 10147, 22069251, 602351808741, 215717608046511873, 1046591482728407939338275, 70417932475495769964322670258947, 66880713903767740581650957184096513655153, 909176713758393122455793478657031533216492953328933, 178876969166665269546249744608783223036842010760723370462856181, 514016665650183402309555825250370336139392333285719205357202846243695510965]

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

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