A223677 Number of nX5 0..1 arrays with rows and antidiagonals unimodal.

16, 256, 3177, 35509, 384009, 4106403, 43632367, 462307835, 4893189359, 51766786082, 547539109894, 5790804006475, 61241515380486, 647657786582245, 6849233638750700, 72433084682283498, 766004610399351979

Offset: 1

Author

R. H. Hardin Mar 25 2013

Keywords

• nonn

Comments

Column 5 of A223680

Examples

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

Links

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

Formula

Empirical: a(n) = 16*a(n-1) -65*a(n-2) +116*a(n-3) -387*a(n-4) -316*a(n-5) +5502*a(n-6) -6052*a(n-7) -5304*a(n-8) +10256*a(n-9) -13182*a(n-10) +1596*a(n-11) +36430*a(n-12) -48912*a(n-13) +27205*a(n-14) -2186*a(n-15) -10400*a(n-16) +7800*a(n-17) -2128*a(n-18) +192*a(n-19)