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A235418 Number of (n+1)X(2+1) 0..2 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise 1
432, 5022, 60231, 533868, 4740889, 33788761, 241566875, 1459008798, 8848965583, 46891736689, 249575149293, 1188461312849, 5682088960329, 24740156703465, 108084980986187, 435986901071266, 1763432694210089, 6658246691642318 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A235421

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A248460 A234327 A174717 * A235422 A234405 A234400

Adjacent sequences:  A235415 A235416 A235417 * A235419 A235420 A235421

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 10 2014

STATUS

approved

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Last modified December 6 18:16 EST 2021. Contains 349567 sequences. (Running on oeis4.)