A183740 Number of (n+1) X 2 0..2 arrays with equal numbers of 2 X 2 subblocks with sum over 4 and with sum under 4.

19, 147, 1041, 10231, 76355, 639129, 5262685, 45272931, 382928623, 3284527183, 28183944013, 243625884229, 2108556673765, 18314858156217, 159384230179203, 1390406836401831, 12149636212862815, 106349025711686091

Offset

1,1

Comments

Column 1 of A183748.

Links

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

Example

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

Crossrefs

Sequence in context: A183748 A241620 A069423 * A162872 A354337 A157682

Adjacent sequences: A183737 A183738 A183739 * A183741 A183742 A183743

Keyword

nonn

Author

R. H. Hardin, Jan 06 2011

Status

approved