A204229 Number of (n+1)X8 0..2 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards

751689, 67329896, 5466340007, 239090847020, 10297878073062, 271354063234561, 7163822258608797, 130426974499112184

Offset

1,1

Comments

Column 7 of A204230

Links

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

Example

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

Crossrefs

Sequence in context: A205519 A166001 A253374 * A290161 A244308 A273971

Adjacent sequences: A204226 A204227 A204228 * A204230 A204231 A204232

Keyword

nonn

Author

R. H. Hardin Jan 13 2012

Status

approved