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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.

A378400 Number of subsets of {1,2,3,...,n}^2 with the property that every point has exactly two other closest points.

Table of values

n	a(n)
0	1
1	1
2	2
3	8
4	52
5	676
6	14463

List of values

[1, 1, 2, 8, 52, 676, 14463]

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

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