A235403 Number of (n+1)X(2+1) 0..2 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise

450, 5916, 87902, 924132, 9730723, 80383489, 662290407, 4576924546, 31580340379, 190518611734, 1148195429676, 6221435108518, 33683343615674, 167262023356753, 829982597507961, 3834137745688182, 17700362554876591, 76951709086870096

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