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A203021 Number of nX3 nonnegative integer arrays with adjacent horizontal and vertical element pair sums equal to all values in 0..2nk-n-k-1 (each exactly once) 0
2, 36, 3216, 257664, 69822004 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A203022

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for n=3

..0..1..7....0..2..8....7..1..4....4..6..0....1..7..0....0..1..4....9..0..1

..0..2..4....0..3..1....0..1..2....7..2..3....0..2..3....0..8..2....2..0..3

..4..3..6....1..5..6....0..9..2....0..0..1....0..4..7....4..3..0....5..5..3

CROSSREFS

Sequence in context: A178949 A200571 A213985 * A001070 A095229 A047832

Adjacent sequences:  A203018 A203019 A203020 * A203022 A203023 A203024

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 27 2011

STATUS

approved

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Last modified May 26 07:30 EDT 2017. Contains 287093 sequences.