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A184601
1/4 the number of (n+1) X 7 binary arrays with equal numbers of 2 X 2 subblocks with sums 1 and 3.
1
784, 60569, 6045460, 661355087, 75369979530, 8783684627835, 1038876920232926, 124201308194651058, 14971003403040041129, 1816251101842544994491, 221492117754765269030948, 27126817151861700072792723
OFFSET
1,1
COMMENTS
Column 6 of A184604.
LINKS
EXAMPLE
Some solutions for 3 X 7:
..1..0..1..1..1..0..1....0..0..0..1..1..1..0....1..0..1..1..0..1..0
..1..0..0..1..1..1..0....1..0..0..1..0..0..1....0..0..1..1..0..1..1
..0..0..0..1..1..0..0....1..1..1..0..0..1..1....1..0..0..1..0..1..0
CROSSREFS
Sequence in context: A223493 A231976 A188782 * A151658 A231771 A366829
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 18 2011
STATUS
approved