A251907 Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 4 or 5

87472, 1524496, 31829596, 634891856, 13021221976, 273455709590, 5736244294410, 120526186216112, 2541263626822798, 53645899122636266, 1133356776834050890, 23966135822457282108, 507119909614017945682, 10735550087632824612072

Offset

1,1

Comments

Column 2 of A251909

Links

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

Example

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

Crossrefs

Sequence in context: A098186 A069313 A022207 * A238052 A118899 A253340

Adjacent sequences: A251904 A251905 A251906 * A251908 A251909 A251910

Keyword

nonn

Author

R. H. Hardin, Dec 10 2014

Status

approved