

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
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OFFSET

1,1


COMMENTS



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



KEYWORD

nonn


AUTHOR



STATUS

approved



