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A203485
Number of n X 2 0..2 arrays with row sums equal and column sums unequal to adjacent columns.
1
6, 10, 36, 82, 256, 676, 2050, 5826, 17568, 51640, 155590, 463996, 1397766, 4192646, 12626836, 37955426, 114267376, 343694728, 1034313190, 3111132672, 9359196778, 28146901826, 84646727920, 254509346220, 765178882006, 2300166018706
OFFSET
1,1
COMMENTS
Column 2 of A203491.
LINKS
EXAMPLE
Some solutions for n=5
..2..0....2..0....1..0....2..0....0..2....0..2....1..0....2..0....2..0....0..1
..1..1....0..2....0..1....2..0....2..0....1..1....0..1....1..1....1..1....0..1
..0..2....0..2....0..1....2..0....0..2....0..2....1..0....1..1....0..2....1..0
..2..0....0..2....0..1....2..0....0..2....0..2....0..1....0..2....2..0....0..1
..1..1....2..0....0..1....0..2....1..1....0..2....1..0....2..0....2..0....0..1
CROSSREFS
Cf. A203491.
Sequence in context: A167330 A025629 A068889 * A221519 A332984 A038264
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 02 2012
STATUS
approved