A184600 1/4 the number of (n+1) X 6 binary arrays with equal numbers of 2 X 2 subblocks with sums 1 and 3.

214, 8268, 411825, 22581061, 1291076970, 75369979530, 4461217004146, 266823559411796, 16087490826015621, 976144514798586404, 59534845819156963374, 3646426116234905396563, 224132828382262166503511

Offset

1,1

Comments

Column 5 of A184604.

Links

R. H. Hardin, Table of n, a(n) for n = 1..96

Example

Some solutions for 3 X 6:
..1..1..1..1..0..0....1..0..1..1..1..1....1..0..1..1..1..1....0..0..1..1..1..1
..1..0..0..0..1..1....0..0..0..1..1..1....0..1..0..1..0..1....1..1..0..0..0..1
..0..0..1..1..0..1....0..0..1..1..1..0....0..0..0..0..1..0....1..0..0..1..1..0

Crossrefs

Sequence in context: A204486 A221807 A200043 * A278093 A259015 A207279

Adjacent sequences: A184597 A184598 A184599 * A184601 A184602 A184603

Keyword

nonn

Author

R. H. Hardin, Jan 18 2011

Status

approved