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.

A267641 Number of nX5 0..1 arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.

Original entry on oeis.org

7, 98, 429, 2887, 8917, 47715, 128441, 647101, 1614281, 8168679, 19332185, 101212349, 229707509, 1260768903, 2761416109, 15947280405, 33873126897, 205385367891, 424974329569, 2690957511285, 5447493560049, 35782122811899
Offset: 1

Views

Author

R. H. Hardin, Jan 18 2016

Keywords

Comments

Column 5 of A267644.

Examples

			Some solutions for n=6
..0..1..1..0..1....0..0..1..0..1....0..1..0..1..1....0..1..0..1..0
..0..1..0..1..0....1..0..0..1..0....1..0..1..0..1....1..0..1..0..1
..1..0..1..0..1....0..1..1..0..1....0..1..1..0..0....0..1..0..1..0
..0..0..1..1..0....1..0..1..0..0....1..0..0..1..0....1..0..1..0..1
..1..1..0..1..0....0..1..0..1..0....0..0..1..0..1....1..1..0..0..1
..1..0..1..0..1....0..1..1..0..1....1..1..0..1..0....0..0..1..1..0
		

Crossrefs

Cf. A267644.

Formula

Empirical recurrence of order 93 (see link above)