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A186797 Number of (n+2)X(n+2) binary arrays with no 3X3 subblock commuting with any horizontal or vertical neighbor 3X3 subblock 0
512, 59907, 26628581, 44618824642, 281222068231208, 6674101867860962707 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A186806

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for 4X4

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

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

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

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

CROSSREFS

Sequence in context: A250567 A035753 A107549 * A183815 A013701 A187461

Adjacent sequences:  A186794 A186795 A186796 * A186798 A186799 A186800

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 26 2011

STATUS

approved

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Last modified May 18 19:51 EDT 2022. Contains 353824 sequences. (Running on oeis4.)