A224155 Number of nX5 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.

16, 101, 373, 1156, 3469, 10562, 32910, 105020, 342575, 1136503, 3815322, 12904448, 43836891, 149266926, 508857756, 1735637682, 5921189882, 20201365165, 68920464104, 235127759007, 802136163910, 2736424196762, 9334965911219

Offset: 1

Author

R. H. Hardin Mar 31 2013

Keywords

• nonn

Comments

Column 5 of A224158

Examples

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

Links

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

Formula

Empirical: a(n) = 6*a(n-1) -9*a(n-2) -a(n-3) +a(n-4) +23*a(n-5) -38*a(n-6) +42*a(n-7) -41*a(n-8) +89*a(n-9) -67*a(n-10) -9*a(n-11) +5*a(n-12) -32*a(n-13) -50*a(n-14) -12*a(n-15) -58*a(n-16) -28*a(n-17) +12*a(n-18) +4*a(n-20) for n>22