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A281538 Number of nX6 0..2 arrays with no element equal to more than one of its king-move neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards. 1
9, 3056, 63840, 146956, 290073, 560972, 1066920, 2001002, 3797780, 7294930, 13957058, 26289482, 48689121, 88983896, 161189818, 290577490, 522149018, 935543592, 1669547078, 2965851310, 5243956096, 9233806648, 16204912228 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A281540.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..44

EXAMPLE

Some solutions for n=4

..0..1..0..1..2..0. .0..0..1..1..2..1. .0..1..2..0..2..1. .0..1..0..2..2..1

..0..2..2..1..2..1. .1..2..2..0..2..0. .2..0..1..0..1..0. .0..2..0..1..0..0

..0..1..0..0..2..0. .1..0..1..1..2..1. .2..0..2..0..2..0. .2..1..0..1..2..1

..2..1..2..1..1..0. .2..0..2..0..0..2. .1..1..2..1..1..2. .0..1..2..0..2..0

CROSSREFS

Cf. A281540.

Sequence in context: A068729 A321282 A159775 * A335010 A203744 A234145

Adjacent sequences:  A281535 A281536 A281537 * A281539 A281540 A281541

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 23 2017

STATUS

approved

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Last modified December 4 13:05 EST 2020. Contains 338923 sequences. (Running on oeis4.)