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A207726 Number of nX5 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 1 and 1 0 1 vertically 1
15, 225, 611, 2163, 8575, 27931, 88243, 288813, 926949, 2927115, 9278885, 29390445, 92717065, 292337359, 921806095, 2904391209, 9147369231, 28808166663, 90713456051, 285607327515, 899181685831, 2830809676285, 8911643119525 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A207729

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-1) -3*a(n-2) +10*a(n-3) -27*a(n-4) -6*a(n-5) -15*a(n-6) +51*a(n-7) +41*a(n-8) +31*a(n-9) -51*a(n-10) -29*a(n-11) -27*a(n-12) +15*a(n-13) +6*a(n-14) +3*a(n-15) -4*a(n-16) +a(n-17) +a(n-19)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A207690 A207925 A208105 * A207596 A208115 A267784

Adjacent sequences:  A207723 A207724 A207725 * A207727 A207728 A207729

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 19 2012

STATUS

approved

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Last modified October 19 09:22 EDT 2021. Contains 348074 sequences. (Running on oeis4.)