A224036 Number of nX6 0..1 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.

7, 34, 119, 363, 1064, 3107, 9125, 26928, 79800, 237348, 708163, 2118654, 6353180, 19088180, 57442255, 173085671, 522085599, 1576088206, 4761041486, 14389487483, 43507313943, 131587493711, 398081815019, 1204514245101, 3645147239577

Offset: 1

Author

R. H. Hardin Mar 30 2013

Keywords

• nonn

Comments

Column 6 of A224038

Examples

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

Links

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

Formula

Empirical: a(n) = 7*a(n-1) -15*a(n-2) +6*a(n-3) +11*a(n-4) -4*a(n-5) -7*a(n-6) +6*a(n-7) -6*a(n-8) +8*a(n-9) -8*a(n-10) +16*a(n-11) for n>13