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A297511 Number of 6Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 2 neighboring 1s. 1
1, 876, 11405, 88808, 3075264, 66289769, 978288822, 19677228473, 410226893539, 7428573953424, 139931054756836, 2750243232989133, 52290968094715743, 990034495588191380, 19031260437956001426, 364274317770524751427 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 6 of A297506.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A297506.

Sequence in context: A252212 A038658 A065700 * A297725 A185989 A190930

Adjacent sequences:  A297508 A297509 A297510 * A297512 A297513 A297514

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 31 2017

STATUS

approved

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Last modified January 24 06:43 EST 2021. Contains 340398 sequences. (Running on oeis4.)