A252160 Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 2 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 2 3 4 6 or 7

2581, 3712, 5025, 7570, 12522, 21186, 37337, 68096, 124387, 231325, 437943, 826729, 1573451, 3026541, 5799316, 11168884, 21666676, 41896587, 81298755, 158474687, 308340366, 601219256, 1175888798, 2297341782, 4494637959, 8811577756

Offset

1,1

Comments

Column 1 of A252167

Links

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

Example

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

Crossrefs

Sequence in context: A171257 A252159 A252167 * A236425 A235840 A200711

Adjacent sequences: A252157 A252158 A252159 * A252161 A252162 A252163

Keyword

nonn

Author

R. H. Hardin, Dec 14 2014

Status

approved