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A187421 Number of (n+1)X4 0..2 arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants 1
609, 6512, 46764, 602024, 5254072, 56472058, 533853394, 5585054046, 54998694426, 562340568708, 5598043072500, 56738877828678, 568753193822092, 5743694780294918, 57708886492197048, 581740972471740850 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A187425
LINKS
EXAMPLE
Some solutions for 3X4
..2..1..0..1....0..0..0..1....2..2..0..2....0..2..2..2....1..0..2..0
..2..2..2..1....0..0..1..1....1..2..0..0....0..1..1..2....2..1..2..1
..0..1..2..0....2..0..2..1....0..2..0..0....1..1..0..2....1..1..0..1
CROSSREFS
Sequence in context: A252436 A179247 A172344 * A296825 A186213 A246880
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 09 2011
STATUS
approved

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Last modified July 19 04:35 EDT 2024. Contains 374388 sequences. (Running on oeis4.)