cp's OEIS Frontend

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.

A250906 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having its maximum diagonal element less than its minimum antidiagonal element.

Table of values

n a(n)
1 74
2 13401
3 18077319
4 181725094746
5 13614176466285177
6 7601083164098734394079
7 31627738616791159166366474706
8 980775577015597559408509097508207843
9 226662690545871494601898816284099112431799133

List of values

[74, 13401, 18077319, 181725094746, 13614176466285177, 7601083164098734394079, 31627738616791159166366474706, 980775577015597559408509097508207843, 226662690545871494601898816284099112431799133]

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

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