A184465 Half the number of (n+1) X 8 binary arrays with equal numbers of majority one 2 X 2 subblocks and majority zero 2 X 2 subblocks.

4496, 667600, 133687638, 29202473260, 6636592203096, 1543735290815166, 364710845961492808, 87131390011496951676, 20992313186787145920488, 5091049499273022700839604, 1241234020860425300419060324

Offset

1,1

Comments

Column 7 of A184467.

Links

R. H. Hardin, Table of n, a(n) for n = 1..29

Example

Some solutions for 3 X 8
..0..0..0..1..1..1..1..1....0..0..0..1..1..1..1..1....0..0..1..0..1..1..1..1
..0..0..1..0..1..1..0..1....0..0..0..0..1..1..1..1....1..0..0..1..0..1..1..1
..1..0..0..0..0..1..1..0....1..0..0..1..0..0..1..0....0..0..1..0..0..1..0..1
...
...M..M..E..P..P..P..P.......M..M..M..P..P..P..P.......M..M..E..E..P..P..P...
...M..M..M..M..P..P..E.......M..M..M..E..E..P..P.......M..M..E..M..E..P..P...

Crossrefs

Cf. A184467.

Sequence in context: A031565 A031745 A225625 * A385336 A144490 A252470

Adjacent sequences: A184462 A184463 A184464 * A184466 A184467 A184468

Keyword

nonn

Author

R. H. Hardin, Jan 15 2011

Status

approved