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A228387 Number of nX5 binary arrays with top left value 1 and no two ones adjacent horizontally or vertically. 1
5, 29, 268, 2104, 17578, 143072, 1177709, 9646285, 79185086, 649376899, 5327739196, 43702127758, 358509826061, 2940912358777, 24125201563249, 197904782854703, 1623466068552246, 13317706169767704, 109248620592925041 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A228390

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-1) +36*a(n-2) -105*a(n-4) +15*a(n-5) +64*a(n-6) -20*a(n-7) -4*a(n-8) +a(n-9)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A215867 A144015 A326986 * A181356 A177440 A292567

Adjacent sequences:  A228384 A228385 A228386 * A228388 A228389 A228390

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 21 2013

STATUS

approved

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Last modified October 21 19:29 EDT 2019. Contains 328315 sequences. (Running on oeis4.)