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A252600 Number of (n+2)X(3+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 5 1
1218, 2784, 7769, 22623, 71730, 232461, 769153, 2611733, 8938660, 30784161, 106717723, 370643667, 1289466342, 4493808206, 15667121453, 54642066857, 190661995672, 665342388224, 2322000538539, 8104544517695, 28288209668384 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A252605
LINKS
FORMULA
Empirical recurrence of order 75 (see link above)
EXAMPLE
Some solutions for n=4
..2..1..1..2..0....2..2..2..2..2....2..2..2..2..0....2..0..2..2..0
..0..1..2..0..2....2..1..1..1..1....2..2..2..2..2....2..2..0..1..2
..2..2..0..1..2....0..0..0..0..0....0..2..2..2..2....0..2..2..0..1
..2..0..1..2..0....2..2..2..2..2....2..2..0..2..2....2..0..2..2..0
..0..1..2..0..2....1..2..1..1..1....2..2..2..2..0....1..2..0..2..2
..2..2..0..2..2....0..0..0..0..0....2..2..2..0..2....0..1..2..0..2
CROSSREFS
Sequence in context: A032628 A175964 A300408 * A293479 A031781 A069400
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 19 2014
STATUS
approved

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Last modified July 22 16:55 EDT 2024. Contains 374540 sequences. (Running on oeis4.)