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A210126
Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having one, three or four distinct values, and new values 0..3 introduced in row major order
0
8, 2609, 7873809, 198219480450, 41562568796591219, 72599208484317720843697, 1056388250136974018200396639877, 128049790734830831106262989769387911331
OFFSET
1,1
COMMENTS
Diagonal of A210134
EXAMPLE
Some solutions for n=4
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..1....0..1..0..0..1
..0..0..0..0..0....1..2..3..2..3....2..1..3..1..2....1..2..1..2..2
..0..0..0..0..0....0..2..1..0..1....1..3..2..2..0....3..0..3..3..0
..0..0..0..0..0....2..1..3..2..1....2..2..1..3..0....0..1..3..3..2
..1..2..1..3..2....3..0..3..1..0....1..3..2..2..1....1..2..1..0..1
CROSSREFS
Sequence in context: A325062 A247733 A343696 * A259440 A172957 A233169
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 17 2012
STATUS
approved