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A236280 Number of (n+1)X(3+1) 0..2 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and columnwise 1
2304, 87450, 4297035, 134940646, 4211459815, 95929739101, 2162880693927, 38763321249354, 689909923903006, 10265327850180055, 152018370286618223, 1944434455125197226, 24788066196034182283, 279219990393795104480 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A236282

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..182

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A235423 A235419 A229698 * A187194 A170785 A259321

Adjacent sequences:  A236277 A236278 A236279 * A236281 A236282 A236283

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 21 2014

STATUS

approved

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Last modified January 19 03:54 EST 2020. Contains 331031 sequences. (Running on oeis4.)