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A186485 Number of (n+1) X (n+1) 0..5 arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors. 1
1296, 1638, 49225, 187120, 2297416, 7285701, 85779021, 302363961, 3344266701, 12548833941, 129972246981, 515938724421, 5061186988761, 21139419297501, 197573066244141, 863365403630181, 7729201644744621, 35162376035723961 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A186486.
LINKS
EXAMPLE
Some solutions for 3 X 3:
..0..3..2....4..2..0....5..3..0....3..3..0....3..5..0....0..0..5....3..0..0
..0..0..3....3..0..2....1..0..3....1..0..3....5..0..5....0..0..0....4..0..0
..0..0..0....0..3..0....0..1..5....0..1..2....0..5..3....0..0..0....0..4..4
CROSSREFS
Cf. A186486.
Sequence in context: A179536 A273631 A186486 * A281399 A043372 A217908
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 22 2011
STATUS
approved

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Last modified March 28 16:12 EDT 2024. Contains 371254 sequences. (Running on oeis4.)