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A297308 Number of n X n 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 or 2 neighboring 1's. 1
1, 7, 117, 3808, 484808, 200646607, 197589351469, 578079526400673, 5377924483062338484, 139752957415982420114129, 10302206214700301342887034910, 2267938084956284272782357464419480 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A297314.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..17

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A297314.

Sequence in context: A096760 A178791 A299429 * A077394 A009696 A218049

Adjacent sequences:  A297305 A297306 A297307 * A297309 A297310 A297311

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 28 2017

STATUS

approved

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Last modified January 29 00:42 EST 2022. Contains 350670 sequences. (Running on oeis4.)