A235445 Number of (n+1)X(4+1) 0..1 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing rowwise and columnwise.

742, 15936, 335898, 7017768, 146213244, 3043145826, 63315473350, 1317184566572, 27401048899854, 570010121664030, 11857587445735140, 246666181271526484, 5131244813184060086, 106742118037538403444, 2220490316595946662760

Offset: 1

Author

R. H. Hardin, Jan 10 2014

Keywords

• nonn

Comments

Column 4 of A235449

Examples

			Some solutions for n=2
..1..1..1..0..1....1..0..1..1..0....1..1..0..0..0....0..1..0..0..0
..1..0..1..1..1....0..0..1..0..0....1..0..1..1..1....1..1..1..1..0
..1..0..0..1..0....0..1..0..1..1....0..0..1..0..0....0..0..0..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 53

Formula

Empirical recurrence of order 53 (see link above)