A251644 Number of (n+2)X(n+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 0 2 4 5 7 or 9

376, 908, 4522, 24706, 482506, 5167050, 63447690, 5347152010, 106694711818, 2999615701322, 1150053080327434, 39747272207928330, 2598427682764572298, 4665358804935179388426, 266654123118022807281674

Offset

1,1

Comments

Diagonal of A251652

Links

R. H. Hardin, Table of n, a(n) for n = 1..16

Example

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

Crossrefs

Sequence in context: A238231 A008853 A188007 * A234916 A288916 A198640

Adjacent sequences: A251641 A251642 A251643 * A251645 A251646 A251647

Keyword

nonn

Author

R. H. Hardin, Dec 06 2014

Status

approved