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A235260 Number of (n+1)X(3+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise 1
22500, 2691067, 417967682, 41170730836, 3998547995093, 282203684810984, 19728773908721866, 1090479569705332324, 59978597869556298802, 2740097672205395658455, 124802366974771368162608 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A235261

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..31

EXAMPLE

Some solutions for n=1

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

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

CROSSREFS

Sequence in context: A204305 A251116 A235415 * A236085 A334532 A249614

Adjacent sequences:  A235257 A235258 A235259 * A235261 A235262 A235263

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 05 2014

STATUS

approved

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Last modified September 23 20:42 EDT 2021. Contains 347617 sequences. (Running on oeis4.)