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A204229 Number of (n+1)X8 0..2 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards 1
751689, 67329896, 5466340007, 239090847020, 10297878073062, 271354063234561, 7163822258608797, 130426974499112184 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 23 20:42 EDT 2021. Contains 347617 sequences. (Running on oeis4.)