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A185806 Number of (n+1)X9 0..3 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace 0
85438016, 847003638592, 3849846787713472, 21422296324609759008, 114404199665472905793216 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 8 of A185807

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for 3X9

..0..0..0..0..3..2..0..3..0....0..0..0..0..1..0..0..0..1

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

..0..0..0..0..0..0..1..0..3....0..0..0..0..0..0..0..3..3

CROSSREFS

Sequence in context: A295465 A230794 A186922 * A115534 A138030 A104964

Adjacent sequences:  A185803 A185804 A185805 * A185807 A185808 A185809

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 04 2011

STATUS

approved

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Last modified December 6 19:27 EST 2021. Contains 349567 sequences. (Running on oeis4.)