A251855 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 more

23664, 459952, 10413561, 216245728, 4504504613, 95484824630, 2014749003137, 42431856405171, 894942181261893, 18875574496561053, 398002497183748752, 8392744063343679219, 176985313926803440855, 3732159821929478119097

Offset

1,1

Comments

Column 2 of A251858

Links

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

Example

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

Crossrefs

Sequence in context: A230361 A069334 A118061 * A200437 A223342 A179918

Adjacent sequences: A251852 A251853 A251854 * A251856 A251857 A251858

Keyword

nonn

Author

R. H. Hardin, Dec 09 2014

Status

approved