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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 December 4 18:39 EST 2023. Contains 367563 sequences. (Running on oeis4.)