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A185924 Number of (n+1)X(n+1) 0..3 arrays with no 2X2 subblock trace equal to any horizontal or vertical neighbor 2X2 subblock trace 0
256, 130944, 590014464, 23071825269024, 7847745868957709536, 23221991267256751327588320, 597768284764394563452665098460064 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A185933

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for 3X3

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

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

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

CROSSREFS

Sequence in context: A236941 A222141 A333585 * A013997 A118056 A185563

Adjacent sequences:  A185921 A185922 A185923 * A185925 A185926 A185927

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2011

STATUS

approved

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Last modified August 11 11:29 EDT 2022. Contains 356065 sequences. (Running on oeis4.)