A206055 Number of (n+1)X(n+1) 0..3 arrays with every 2X3 or 3X2 subblock having exactly two clockwise edge increases

256, 21140, 1278672, 111242648, 18209383140, 5567891627984, 3548796740666104, 4531526542739275184, 11370221346994594652040, 60827254093069565745485584, 666208249155797450019782873520, 14561819290550204381850004841878000

Offset

1,1

Comments

Diagonal of A206063

Links

Table of n, a(n) for n=1..12.

Example

Some solutions for n=4
..2..2..2..0..1....2..3..3..1..3....1..0..0..0..0....1..3..0..3..3
..3..0..3..0..0....1..1..2..3..3....3..1..2..1..1....3..0..0..2..0
..1..1..2..3..3....1..1..3..3..0....3..0..1..1..0....0..0..1..3..3
..1..1..3..3..0....0..3..3..1..1....3..1..1..2..1....1..2..3..3..2
..3..2..3..0..1....1..3..2..1..1....3..1..2..3..0....1..3..3..0..3

Crossrefs

Sequence in context: A206181 A251968 A017116 * A237134 A205948 A309827

Adjacent sequences: A206052 A206053 A206054 * A206056 A206057 A206058

Keyword

nonn

Author

R. H. Hardin Feb 03 2012

Status

approved