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A188368 Number of (n+1)X3 0..3 arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums 1
704, 15776, 315520, 6781400, 146491208, 3204417424, 70324529528, 1550290704312, 34247741174176, 758246919492968, 16810324686733992, 373161215486655440, 8291015786317391720, 184361263940488110328, 4102028210533831306896 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A188370

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..54

EXAMPLE

Some solutions for 4X3

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

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

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

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

CROSSREFS

Sequence in context: A185799 A186916 A185800 * A185569 A238322 A091553

Adjacent sequences:  A188365 A188366 A188367 * A188369 A188370 A188371

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 29 2011

STATUS

approved

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Last modified November 24 16:41 EST 2014. Contains 249899 sequences.