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A297512 Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 2 neighboring 1s. 1
1, 2735, 53175, 573119, 35919085, 1272836591, 28914051279, 949224569894, 32507021089982, 940396282368163, 28523594741249476, 910897573503281049, 27940827448011878850, 852581385081080135117, 26505475722899552411184 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 7 of A297506.

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

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

CROSSREFS

Cf. A297506.

Sequence in context: A045155 A251989 A251985 * A297726 A122473 A253994

Adjacent sequences:  A297509 A297510 A297511 * A297513 A297514 A297515

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 31 2017

STATUS

approved

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Last modified September 15 18:22 EDT 2019. Contains 327082 sequences. (Running on oeis4.)