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

1,1

Comments

Column 5 of A223680

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)

Example

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

Crossrefs

Sequence in context: A283860 A223660 A223565 * A207277 A294329 A267929

Adjacent sequences: A223674 A223675 A223676 * A223678 A223679 A223680

Keyword

nonn

Author

R. H. Hardin Mar 25 2013

Status

approved