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A235777 Number of (n+1)X(2+1) 0..3 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise 1
2612, 68942, 1581879, 30969609, 545929374, 8741113000, 130024832317, 1814248350284, 24045049867402, 304974560820729, 3731440079988996, 44289621774986740, 512802242862242358, 5816732007527994942 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A235779

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A054258 A236666 A252341 * A235557 A257427 A257420

Adjacent sequences:  A235774 A235775 A235776 * A235778 A235779 A235780

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 15 2014

STATUS

approved

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Last modified July 5 16:07 EDT 2020. Contains 335473 sequences. (Running on oeis4.)