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A235415 Number of (n+1)X(3+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise 1
22500, 1826923, 149643266, 9676094946, 623604857055, 32662713888028, 1724073736174640, 76002795623829546, 3387480212316840735, 129022109042050899256, 4972470574066747942531, 166872014375969665991253 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A235416

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..28

EXAMPLE

Some solutions for n=1

..3..0..2..0....1..2..2..1....3..3..1..0....3..2..0..0....1..3..1..2

..3..2..1..2....2..0..1..1....3..3..0..1....3..0..2..2....1..2..0..2

CROSSREFS

Sequence in context: A250441 A204305 A251116 * A235260 A236085 A249614

Adjacent sequences:  A235412 A235413 A235414 * A235416 A235417 A235418

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 10 2014

STATUS

approved

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Last modified January 25 19:09 EST 2020. Contains 331249 sequences. (Running on oeis4.)