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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.

A219877 Number of n X n arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X n array.

Table of values

n a(n)
1 3
2 7
3 47
4 621
5 14536
6 764027
7 113313853

List of values

[3, 7, 47, 621, 14536, 764027, 113313853]

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

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