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A303312 Number of nX6 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
13, 13, 67, 128, 410, 1221, 3453, 10223, 30247, 88071, 257997, 758575, 2222443, 6510901, 19099863, 56003627, 164158635, 481322825, 1411283805, 4137560893, 12130815503, 35567022201, 104278542849, 305732562651, 896380484697 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A303314.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +2*a(n-2) +10*a(n-3) +6*a(n-4) -5*a(n-5) -15*a(n-6) -8*a(n-7) -4*a(n-8) for n>11

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A303314.

Sequence in context: A147013 A147187 A147069 * A146471 A071612 A059796

Adjacent sequences:  A303309 A303310 A303311 * A303313 A303314 A303315

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 21 2018

STATUS

approved

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Last modified October 25 17:22 EDT 2021. Contains 348255 sequences. (Running on oeis4.)