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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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 13 2012
STATUS
approved

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Last modified April 22 21:44 EDT 2024. Contains 371906 sequences. (Running on oeis4.)