A252034 Number of (n+2)X(2+2) 0..4 arrays with every 3X3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime

31774, 55941, 84953, 183494, 710758, 2297641, 9138994, 27977649, 118955569, 380855595, 1552701716, 4826092817, 20665212175, 66338031686, 273170530792, 850783059320, 3644378584228, 11704818279088, 48350109615945

Offset

1,1

Comments

Column 2 of A252039

Links

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

Example

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

Crossrefs

Sequence in context: A184206 A193742 A206114 * A284519 A183704 A278013

Adjacent sequences: A252031 A252032 A252033 * A252035 A252036 A252037

Keyword

nonn

Author

R. H. Hardin, Dec 12 2014

Status

approved