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A301962 Number of nX6 0..1 arrays with every element equal to 0, 1 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero. 1
13, 22, 74, 219, 749, 2544, 8705, 29750, 101869, 348726, 1194018, 4088095, 13997248, 47925030, 164090446, 561828851, 1923644742, 6586363735, 22551038555, 77212460575, 264367602921, 905167759481, 3099202251216, 10611352989541 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A301964.

LINKS

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

FORMULA

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A301964.

Sequence in context: A164418 A301788 A164409 * A298235 A111676 A058030

Adjacent sequences: A301959 A301960 A301961 * A301963 A301964 A301965

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 29 2018

STATUS

approved

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Last modified November 30 21:57 EST 2022. Contains 358453 sequences. (Running on oeis4.)