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A303318 Number of 6Xn 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
32, 14, 34, 165, 349, 1221, 7096, 30280, 102683, 403872, 1783894, 7248640, 27856927, 111871711, 461547267, 1859721535, 7397094062, 29793428041, 120739708314, 486065859963, 1951092593903, 7859276232228, 31701254570200, 127635189909079 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A303314.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +3*a(n-2) +18*a(n-3) +87*a(n-4) +23*a(n-5) -149*a(n-6) -305*a(n-7) -678*a(n-8) -45*a(n-9) +981*a(n-10) +937*a(n-11) +1834*a(n-12) +317*a(n-13) -1968*a(n-14) -1457*a(n-15) -2157*a(n-16) -964*a(n-17) +830*a(n-18) +254*a(n-19) +161*a(n-20) +152*a(n-21) -15*a(n-22) -3*a(n-23) for n>28

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Cf. A303314.

Sequence in context: A302684 A302519 A281720 * A097614 A069892 A070621

Adjacent sequences:  A303315 A303316 A303317 * A303319 A303320 A303321

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 21 2018

STATUS

approved

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Last modified August 5 07:29 EDT 2020. Contains 336209 sequences. (Running on oeis4.)