A188989 Number of nX6 binary arrays without the pattern 0 0 1 antidiagonally or horizontally.

33, 1089, 21952, 423606, 7844188, 144733702, 2668260348, 49183191266, 906546313088, 16709359181770, 307984617365928, 5676728147678902, 104632630902956668, 1928573464163110638, 35547186061830482980

Offset

1,1

Comments

Column 6 of A188992

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Formula

Empirical: a(n) = 22*a(n-1) -47*a(n-2) -420*a(n-3) +1353*a(n-4) +490*a(n-5) -5593*a(n-6) +15840*a(n-7) -27360*a(n-8) +19496*a(n-9) -1828*a(n-10) -1376*a(n-11) -576*a(n-12) for n>14

Example

Some solutions for 3X6
..0..1..1..0..1..1....1..1..0..1..0..1....1..1..1..1..0..1....1..0..1..1..0..0
..1..1..1..1..1..0....0..1..0..1..0..0....1..1..1..0..1..0....1..0..1..1..1..1
..0..1..0..1..1..1....0..1..0..1..1..1....1..1..0..1..0..1....1..0..1..0..0..0

Crossrefs

Sequence in context: A188760 A189699 A207092 * A189199 A009977 A371760

Adjacent sequences: A188986 A188987 A188988 * A188990 A188991 A188992

Keyword

nonn

Author

R. H. Hardin, Apr 15 2011

Status

approved