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A202130 Number of zero-sum nX1 -3..3 arrays with every element equal to at least one horizontal or vertical neighbor 1
0, 1, 1, 7, 5, 43, 43, 275, 371, 1913, 3017, 14305, 25039, 109803, 212645, 866361, 1818147, 6992905, 15653093, 57383555, 135498383, 477220531, 1177254905, 4012238901, 10256656225, 34031432595, 89553075529, 290731277941 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
COMMENTS
Column 1 of A202134
LINKS
EXAMPLE
Some solutions for n=8
.-2....3...-3....1....3....0...-3....0....0....0...-2...-3...-1...-2....2....0
.-2....3...-3....1....3....0...-3....0....0....0...-2...-3...-1...-2....2....0
..0...-2....3...-2...-2....2....2....3....1...-1...-1....2....3....2....2...-1
..0...-2....3...-2...-2....2....2....3....1...-1...-1....2....3....2....2...-1
..1....1...-3....1....0....0....2....3....0....0....3....0....1....0...-2...-1
..1....1...-3....1....0....0....2...-3....0....0....3....0....1....0...-2...-1
..1...-2....3....0...-1...-2...-1...-3...-1....1....0....1...-3....0...-2....2
..1...-2....3....0...-1...-2...-1...-3...-1....1....0....1...-3....0...-2....2
CROSSREFS
Sequence in context: A142883 A146382 A163742 * A089244 A063003 A038271
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 11 2011
STATUS
approved

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Last modified July 23 19:43 EDT 2024. Contains 374553 sequences. (Running on oeis4.)