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A235422 Number of (2+1)X(n+1) 0..2 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise 1
432, 5022, 60879, 543946, 4895505, 35230388, 255103234, 1554228232, 9515328218, 50741400195, 271565143251, 1297890540438, 6219668001557, 27116924880173, 118466428248793, 477662770905341, 1929017445264100, 7271629530089986 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A235421

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..33

EXAMPLE

Some solutions for n=3

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

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

..1..2..1..2....1..2..2..1....2..2..1..1....1..2..1..1....2..1..2..2

CROSSREFS

Sequence in context: A234327 A174717 A235418 * A234405 A234400 A236279

Adjacent sequences:  A235419 A235420 A235421 * A235423 A235424 A235425

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 10 2014

STATUS

approved

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Last modified December 13 12:43 EST 2019. Contains 329968 sequences. (Running on oeis4.)