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A186132 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock trace equal to any horizontal or vertical neighbor 2X2 subblock trace 0
81, 7686, 3090564, 5108761008, 35143110551556, 1006890732907711236, 120347170141816347874560, 60068131623385389414240300432 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A186141

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for 3X3

..2..1..1....1..1..2....0..2..0....1..2..0....1..0..0....1..2..0....2..0..2

..0..2..0....2..1..0....0..2..1....2..2..0....0..2..2....0..1..1....2..1..2

..0..0..1....2..2..1....0..1..2....2..2..1....1..0..2....1..0..1....0..0..0

CROSSREFS

Sequence in context: A222441 A206216 A205056 * A206504 A046172 A123847

Adjacent sequences:  A186129 A186130 A186131 * A186133 A186134 A186135

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 13 2011

STATUS

approved

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Last modified January 18 04:26 EST 2022. Contains 350410 sequences. (Running on oeis4.)