A238284 Number of (n+1)X(4+1) 0..3 arrays with no element greater than all horizontal neighbors or less than all vertical neighbors.

144, 13948, 737366, 27913368, 1058583000, 44441926832, 1931022884277, 82508389421874, 3470891253761820, 145872518046542058, 6155861335428543193, 260232903353528638680, 10995149731230961462745, 464237140754455444786421

Offset: 1

Author

R. H. Hardin, Feb 22 2014

Keywords

• nonn

Comments

Column 4 of A238287

Examples

			Some solutions for n=2
..0..1..3..3..3....1..3..3..3..3....0..2..3..3..3....0..0..2..2..0
..0..1..1..3..3....0..2..2..2..1....0..1..2..2..2....0..0..0..0..0
..1..1..1..3..3....0..2..2..2..1....1..1..2..2..2....1..1..0..0..0
		

Links

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