A236147 Number of (n+1)X(n+1) 0..2 arrays colored with the sets of distinct values in every 2X2 subblock

81, 2502, 146568, 18147240, 4851646302, 2811658914648, 3534532876367268, 9615988088073831552

Offset

1,1

Comments

Diagonal of A236155

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A205512 A297606 A236729 * A237473 A282995 A295274

Adjacent sequences: A236144 A236145 A236146 * A236148 A236149 A236150

Keyword

nonn

Author

R. H. Hardin, Jan 19 2014

Status

approved