A183741 Number of (n+1) X 3 0..2 arrays with equal numbers of 2 X 2 subblocks with sum over 4 and with sum under 4.

147, 2553, 55857, 1389521, 33587307, 829488619, 20777533329, 526362000253, 13427566678795, 344521962594233, 8881010153820905, 229838062571779167, 5967837405163476141, 155396432549860039531, 4056271778433576967047

Offset

1,1

Comments

Column 2 of A183748.

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 5 X 3:
..0..0..1....0..0..1....0..0..0....0..0..0....0..0..0....0..0..1....0..0..0
..0..1..1....1..0..2....1..0..2....2..0..0....0..0..0....1..2..1....1..0..2
..0..2..2....1..0..2....2..2..0....0..2..2....2..2..1....0..2..2....2..1..0
..1..2..0....1..2..2....2..2..0....2..2..0....1..2..0....2..0..0....2..1..2
..1..0..2....1..1..1....2..0..1....1..0..1....0..2..0....0..2..0....2..1..1
...
...M..M.......M..M.......M..M.......M..M.......M..M.......M..E.......M..M...
...M..P.......M..E.......P..E.......E..E.......E..M.......P..P.......E..M...
...P..P.......E..P.......P..E.......P..P.......P..P.......E..E.......P..E...
...E..E.......P..P.......P..M.......P..M.......P..E.......E..M.......P..P...

Crossrefs

Sequence in context: A261939 A251107 A349987 * A020328 A075925 A097729

Adjacent sequences: A183738 A183739 A183740 * A183742 A183743 A183744

Keyword

nonn

Author

R. H. Hardin, Jan 06 2011

Status

approved