A183739 Number of (n+1) X (n+1) 0..2 arrays with equal numbers of 2 X 2 subblocks with sum over 4 and with sum under 4.

19, 2553, 3631179, 55212617129, 7820319558447329, 10344463877985567114685

Offset

1,1

Comments

Diagonal of A183748.

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Sequence in context: A178025 A364851 A172651 * A277000 A055415 A196541

Adjacent sequences: A183736 A183737 A183738 * A183740 A183741 A183742

Keyword

nonn

Author

R. H. Hardin, Jan 06 2011

Status

approved