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A297991 Number of nX6 0..1 arrays with every element equal to 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero. 1
5, 573, 1274, 4648, 18189, 74675, 290466, 1134198, 4475863, 17501388, 68447326, 268885391, 1056650444, 4151346258, 16317217303, 64161745436, 252378618258, 993086741498, 3908970841059, 15390703083981, 60613211125295 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A297993.

LINKS

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

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

CROSSREFS

Cf. A297993.

Sequence in context: A274081 A153404 A297821 * A298844 A298651 A299605

Adjacent sequences:  A297988 A297989 A297990 * A297992 A297993 A297994

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 10 2018

STATUS

approved

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Last modified April 20 02:06 EDT 2019. Contains 322291 sequences. (Running on oeis4.)