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A281883 Number of nX3 0..1 arrays with no element equal to more than four of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. 1
0, 0, 68, 638, 4832, 35002, 241209, 1612568, 10566034, 68136376, 433938423, 2736019588, 17108229189, 106234294380, 655764472080, 4027264205666, 24622851384305, 149957156910166, 910104036599313, 5506462499669112 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 3 of A281888.

LINKS

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

FORMULA

Empirical: a(n) = 10*a(n-1) -17*a(n-2) -28*a(n-3) -122*a(n-4) +132*a(n-5) +368*a(n-6) +570*a(n-7) +171*a(n-8) -746*a(n-9) -979*a(n-10) -2038*a(n-11) -1625*a(n-12) -840*a(n-13) -784*a(n-14) for n>17

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A281888.

Sequence in context: A027850 A248467 A281565 * A282333 A244440 A166398

Adjacent sequences:  A281880 A281881 A281882 * A281884 A281885 A281886

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 01 2017

STATUS

approved

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Last modified January 25 12:40 EST 2022. Contains 350572 sequences. (Running on oeis4.)