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A235438 Number of (n+1)X(2+1) 0..2 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise 1
450, 5295, 65497, 606279, 5672018, 42941705, 326261718, 2114123393, 13717203464, 78618554282, 450962719878, 2341563216530, 12169383655510, 58279149678143, 279416891742504, 1251184914041769, 5610028675479560, 23741327971799762 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A235441

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A253376 A253150 A204224 * A204719 A235403 A204958

Adjacent sequences:  A235435 A235436 A235437 * A235439 A235440 A235441

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 10 2014

STATUS

approved

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Last modified October 15 18:18 EDT 2019. Contains 328037 sequences. (Running on oeis4.)