A251951 Number of (n+2)X(1+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3

2172, 15246, 117100, 922890, 7415658, 60395332, 495518534, 4085061316, 33782603954, 279926794186, 2322421227516, 19283451490582, 160195139697836, 1331233306531628, 11064915354343272, 91981096183559616, 764689232411236710

Offset

1,1

Comments

Column 1 of A251955

Links

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

Example

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

Crossrefs

Sequence in context: A097520 A151771 A251955 * A126844 A235861 A184380

Adjacent sequences: A251948 A251949 A251950 * A251952 A251953 A251954

Keyword

nonn

Author

R. H. Hardin, Dec 11 2014

Status

approved