A252498 Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 5

201803, 8200869, 379549048, 16121522385, 688488765345, 29873208668671, 1289677303950945, 55601840524341479, 2400455819897175867, 103620469170530818520, 4472006410540617508883, 193017617970493153804917

Offset

1,1

Comments

Column 2 of A252500

Links

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

Example

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

Crossrefs

Sequence in context: A233846 A233838 A233837 * A355332 A274815 A242518

Adjacent sequences: A252495 A252496 A252497 * A252499 A252500 A252501

Keyword

nonn

Author

R. H. Hardin, Dec 17 2014

Status

approved