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A185857 1/128 the number of (n+2)X(n+2) binary arrays with no 3X3 subblock trace equal to any horizontal or vertical neighbor 3X3 subblock trace 1
4, 164, 13662, 2306566, 791291609, 573531587857, 902732470133370, 3086713019542215751, 23108662756908572007017, 381917128482182677085935919, 13958774280516860898206752249339, 1128842211487228958365462356514577926 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A185866

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..13

EXAMPLE

Some solutions for 4X4

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

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

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

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

CROSSREFS

Sequence in context: A125532 A229405 A211157 * A347719 A221654 A159011

Adjacent sequences:  A185854 A185855 A185856 * A185858 A185859 A185860

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 05 2011

STATUS

approved

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Last modified October 22 09:37 EDT 2021. Contains 348160 sequences. (Running on oeis4.)