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A251821 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not 3 or 6 and every diagonal and antidiagonal sum 3 or 6 0
1890, 8674, 130826, 1692106, 101716526, 12583469514, 395032012018, 159028764990482, 131396089518942658, 8109916816692482850, 21693086973745341445330 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A251829
LINKS
EXAMPLE
Some solutions for n=3
..0..3..2..3..3....0..0..2..0..3....0..1..0..1..3....0..0..1..0..0
..3..0..2..0..0....3..3..2..0..3....1..0..1..0..1....3..3..1..3..0
..1..1..3..1..1....1..1..3..1..1....3..1..3..1..3....2..2..0..2..2
..0..0..2..0..0....3..3..2..0..3....1..0..1..0..1....3..0..1..3..3
..0..0..2..0..3....0..3..2..3..0....3..1..0..1..0....3..0..1..3..0
CROSSREFS
Sequence in context: A187743 A251829 A251822 * A151773 A020321 A177086
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 09 2014
STATUS
approved

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Last modified June 12 20:44 EDT 2024. Contains 373360 sequences. (Running on oeis4.)