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A251968 Number of (n+1)X(n+1) 0..3 arrays with nondecreasing sum of every two consecutive values in every row and column 1
256, 20000, 6250000, 1500625000, 922368160000, 410018473428480, 371968759094317056, 244967687215822061568, 286806250077948918890496, 248333886971163312349814784, 348300471444720308054703841536 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A251974

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..12

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A216397 A090650 A206181 * A017116 A206055 A237134

Adjacent sequences:  A251965 A251966 A251967 * A251969 A251970 A251971

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 12 2014

STATUS

approved

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Last modified September 21 22:00 EDT 2019. Contains 327283 sequences. (Running on oeis4.)