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A235423 Number of (3+1)X(n+1) 0..2 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise 0
2304, 60231, 1607343, 33361964, 681329430, 11371435264, 191226875455, 2693722807642, 38797084056738, 475948685808390, 6010295272057196, 65600903066982746, 737945948050343658, 7275182009966196680 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A235421

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A177759 A218431 A187292 * A235419 A229698 A236280

Adjacent sequences:  A235420 A235421 A235422 * A235424 A235425 A235426

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 10 2014

STATUS

approved

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Last modified August 18 22:27 EDT 2022. Contains 356215 sequences. (Running on oeis4.)