A252045 Number of (n+2) X (n+2) 0..3 arrays with every 3 X 3 subblock row and column sum not 1 3 6 or 8 and every diagonal and antidiagonal sum 1 3 6 or 8.

1552, 2454, 2674, 6562, 53346, 233342, 658902, 16790430, 127185206, 456725582, 51136630446, 621643287922, 2444602604514, 1337470437403802, 25734548246817278, 104979871659360990, 256731178514562552110

Offset

1,1

Comments

Diagonal of A252053.

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

Example

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

Crossrefs

Cf. A252053.

Sequence in context: A252403 A252053 A252046 * A184683 A235306 A203501

Adjacent sequences: A252042 A252043 A252044 * A252046 A252047 A252048

Keyword

nonn

Author

R. H. Hardin, Dec 13 2014

Status

approved