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A299340 Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 3, 5 or 8 king-move adjacent elements, with upper left element zero. 1
4, 26, 93, 357, 1399, 5513, 21642, 85000, 333982, 1312528, 5157620, 20267541, 79645105, 312982976, 1229932727, 4833285319, 18993441447, 74638863658, 293309650948, 1152624126059, 4529487480525, 17799607536492, 69947434367408 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A299345.

LINKS

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

FORMULA

Empirical: a(n) = 6*a(n-1) -9*a(n-2) +3*a(n-3) +7*a(n-4) -34*a(n-5) +62*a(n-6) -54*a(n-7) +39*a(n-8) -89*a(n-9) +52*a(n-10) +47*a(n-11) +21*a(n-12) -33*a(n-13) -32*a(n-14) +16*a(n-15) +12*a(n-16) for n>18

EXAMPLE

Some solutions for n=7

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

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

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

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

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

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

CROSSREFS

Cf. A299345.

Sequence in context: A298190 A299084 A245457 * A299847 A118285 A101166

Adjacent sequences: A299337 A299338 A299339 * A299341 A299342 A299343

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 07 2018

STATUS

approved

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Last modified February 8 11:37 EST 2023. Contains 360138 sequences. (Running on oeis4.)