A189060 - OEIS

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A189060

Number of nX5 binary arrays without the pattern 0 1 0 antidiagonally or horizontally

21, 441, 6768, 99721, 1492864, 22289912, 333124565, 4978704008, 74410715409, 1112149145053, 16622281551532, 248438608557405, 3713193773280868, 55497854913016132, 829477855588392793, 12397479511499889924

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 5 of A189064

LINKS

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

FORMULA

Empirical: a(n) = 21*a(n-1) -80*a(n-2) -240*a(n-3) +1115*a(n-4) +2917*a(n-5) -15840*a(n-6) +21676*a(n-7) -10784*a(n-8) +1216*a(n-9) for n>10

EXAMPLE

Some solutions for 3X5

..0..1..1..1..0....1..1..0..0..0....0..0..0..1..1....0..0..0..0..1

..1..1..1..1..1....1..1..1..1..0....0..0..1..1..0....1..1..0..1..1

..0..1..1..1..1....1..1..1..0..0....1..0..1..1..1....1..1..0..0..1

CROSSREFS

Sequence in context: A224350 A224192 A207184 * A224009 A167255 A171295

Adjacent sequences: A189057 A189058 A189059 * A189061 A189062 A189063

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 16 2011

STATUS

approved