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A209961 Number of (n+1)X(n+1) 0..3 arrays containing all values 0..3 with every 2X2 subblock having one or two distinct values, and new values 0..3 introduced in row major order 0
0, 26, 25435, 53890394, 351689776895, 8191570949391204, 721612821437109284511, 247946490679458336910844453 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A209969
LINKS
EXAMPLE
Some solutions for n=4
..0..0..1..1..1....0..0..1..2..1....0..0..0..0..0....0..0..0..0..0
..1..0..1..2..1....1..0..1..1..1....0..0..0..0..0....1..0..1..0..0
..0..1..1..1..1....0..0..0..0..1....0..0..0..0..0....0..0..0..0..0
..0..0..0..0..0....3..0..1..0..1....0..0..1..0..0....2..2..0..0..1
..2..0..3..3..3....3..0..1..0..0....2..0..0..0..3....3..2..0..0..1
CROSSREFS
Sequence in context: A336248 A359054 A359052 * A302396 A208186 A316677
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 16 2012
STATUS
approved

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Last modified June 14 02:53 EDT 2024. Contains 373392 sequences. (Running on oeis4.)