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A302518 Number of 5Xn 0..1 arrays with every element equal to 0, 1, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1
16, 9, 14, 48, 90, 199, 689, 2125, 5410, 13908, 39850, 114503, 312683, 845807, 2344052, 6547828, 18092168, 49718487, 137265089, 380242741, 1051385042, 2901539840, 8012628856, 22150069687, 61220830095, 169117170519, 467176484780 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 5 of A302515.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +a(n-2) +3*a(n-3) +20*a(n-4) +7*a(n-5) -2*a(n-6) -6*a(n-7) -40*a(n-8) -6*a(n-9) -2*a(n-10) -2*a(n-11) +22*a(n-12) -5*a(n-13) for n>17

EXAMPLE

Some solutions for n=5

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

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

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

CROSSREFS

Cf. A302515.

Sequence in context: A278829 A066905 A302683 * A070567 A257796 A070688

Adjacent sequences:  A302515 A302516 A302517 * A302519 A302520 A302521

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 09 2018

STATUS

approved

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Last modified October 16 20:36 EDT 2021. Contains 348047 sequences. (Running on oeis4.)