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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.

A220146 Number of n X n arrays of the minimum value of corresponding elements and their horizontal or diagonal 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 11
3 77
4 1174
5 34959
6 3057777
7 822242009
8 671848868714

List of values

[3, 11, 77, 1174, 34959, 3057777, 822242009, 671848868714]

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

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