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A298836 Number of nX3 0..1 arrays with every element equal to 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero. 1
0, 3, 9, 21, 127, 513, 2440, 11458, 53727, 254534, 1202650, 5692243, 26943691, 127540324, 603796896, 2858444154, 13532486972, 64065914939, 303303284790, 1435912281177, 6797962755503, 32183241315912, 152363457753491 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A298841.

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-1) +6*a(n-2) -31*a(n-3) -40*a(n-4) +100*a(n-5) +105*a(n-6) -167*a(n-7) -101*a(n-8) +118*a(n-9) +29*a(n-10) -19*a(n-11) +4*a(n-12) for n>14

EXAMPLE

Some solutions for n=7

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

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

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

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

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

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

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

CROSSREFS

Cf. A298841.

Sequence in context: A074000 A067645 A101474 * A252284 A259367 A193374

Adjacent sequences:  A298833 A298834 A298835 * A298837 A298838 A298839

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 27 2018

STATUS

approved

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Last modified January 20 16:46 EST 2019. Contains 319335 sequences. (Running on oeis4.)