A236941 Number of (n+1)X(n+1) 0..3 arrays with the maximum of every 2X2 subblock equal

256, 112888, 534626674, 33887916009662, 21767431884019104260, 160577378511458058360114308, 12541685260260879735250182260062400, 10826931903978835718436872493300000532953496

Offset

1,1

Comments

Diagonal of A236949

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

Example

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

Crossrefs

Sequence in context: A207295 A205927 A223354 * A222141 A333585 A185924

Adjacent sequences: A236938 A236939 A236940 * A236942 A236943 A236944

Keyword

nonn

Author

R. H. Hardin, Feb 01 2014

Status

approved