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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.

A051570 Consider the problem of placing N queens on an n X n board so that each queen attacks precisely k others. Here k=3 and sequence gives number of different solutions when N takes its maximal value.

Table of values

n a(n)
3 2
4 4
5 31
6 307
7 2
8 9
9 755
10 39302

List of values

[2, 4, 31, 307, 2, 9, 755, 39302]

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