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

1218, 2784, 7769, 22623, 71730, 232461, 769153, 2611733, 8938660, 30784161, 106717723, 370643667, 1289466342, 4493808206, 15667121453, 54642066857, 190661995672, 665342388224, 2322000538539, 8104544517695, 28288209668384

Offset

1,1

Comments

Column 3 of A252605

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical recurrence of order 75

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

Adjacent sequences: A252597 A252598 A252599 * A252601 A252602 A252603

Keyword

nonn

Author

R. H. Hardin, Dec 19 2014

Status

approved