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A235403 Number of (n+1)X(2+1) 0..2 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise 1
450, 5916, 87902, 924132, 9730723, 80383489, 662290407, 4576924546, 31580340379, 190518611734, 1148195429676, 6221435108518, 33683343615674, 167262023356753, 829982597507961, 3834137745688182, 17700362554876591, 76951709086870096 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A235406

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A204224 A235438 A204719 * A204958 A189653 A232035

Adjacent sequences:  A235400 A235401 A235402 * A235404 A235405 A235406

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 10 2014

STATUS

approved

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Last modified September 17 12:41 EDT 2019. Contains 327131 sequences. (Running on oeis4.)