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A303311 Number of nX5 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1
8, 7, 24, 50, 139, 349, 853, 2180, 5525, 13824, 34900, 88161, 221923, 559409, 1411020, 3556271, 8964218, 22600998, 56974213, 143622769, 362071261, 912756908, 2300972077, 5800604608, 14622927344, 36863258801, 92929626827, 234268970653 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A303314.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +9*a(n-3) +2*a(n-4) +4*a(n-5) -10*a(n-6) -6*a(n-7) +4*a(n-9) for n>12

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A303314.

Sequence in context: A126937 A282471 A309877 * A267093 A090099 A138809

Adjacent sequences:  A303308 A303309 A303310 * A303312 A303313 A303314

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 21 2018

STATUS

approved

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Last modified March 4 02:39 EST 2021. Contains 341774 sequences. (Running on oeis4.)