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A204227 Number of (n+1) X 6 0..2 arrays with the sums of 2 X 2 subblocks nondecreasing rightwards and downwards. 2
49284, 2173565, 87487117, 2019310610, 45791699846, 687853333430, 10297878073062, 113754005579615, 1254605391285859, 10988697166912314, 96030748646457765, 701414832964037835, 5107498255064984418 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A204230.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=4

..1..2..2..1..2..2....2..1..2..0..1..1....2..1..2..0..0..1....0..0..2..1..0..0

..1..0..0..1..1..1....0..0..0..1..1..2....0..0..0..1..2..1....1..1..0..0..2..1

..1..2..2..2..2..2....1..2..1..1..0..2....2..2..2..1..2..1....0..1..1..2..1..1

..2..1..1..1..1..1....0..0..0..1..1..2....0..0..1..1..2..2....0..2..2..1..2..2

..1..2..2..2..2..2....1..2..1..1..0..2....2..2..2..2..1..2....2..0..2..2..2..1

CROSSREFS

Cf. A204230.

Sequence in context: A054730 A253379 A253372 * A205279 A185921 A251912

Adjacent sequences:  A204224 A204225 A204226 * A204228 A204229 A204230

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.)