A252306 Number of (1+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 1 3 6 or 7

864, 1126, 1675, 2670, 4349, 7138, 12027, 20001, 33175, 56339, 94176, 156500, 266470, 446079, 742112, 1264356, 2117176, 3525323, 6004166, 10052927, 16753070, 28510417, 47726510, 79602575, 135332893, 226509989, 378121578, 642150721

Offset

1,1

Comments

Row 1 of A252305

Links

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

Example

Some solutions for n=4
..0..0..0..0..0..3....0..2..1..3..2..1....1..3..2..1..0..2....1..3..2..1..3..3
..3..1..2..3..1..3....2..3..1..2..3..2....1..2..0..1..2..0....3..0..0..1..2..3
..1..3..2..1..3..2....0..0..0..0..0..1....0..3..3..0..0..3....0..1..0..0..0..3

Crossrefs

Sequence in context: A252297 A252298 A252305 * A184451 A203662 A179671

Adjacent sequences: A252303 A252304 A252305 * A252307 A252308 A252309

Keyword

nonn

Author

R. H. Hardin, Dec 16 2014

Status

approved