A196016 Number of n X 7 0..4 arrays with each element equal to the number its horizontal and vertical neighbors within one of itself.

1, 9, 32, 231, 835, 3572, 22711, 100094, 517009, 2740712, 14291156, 72486659, 375604408, 1948549100, 10070403094, 52010772351, 269069912146, 1391421035119, 7193724490586, 37198028475134, 192356730926735, 994618459574872, 5142944193784753, 26593708572196934

Offset: 1

Author

R. H. Hardin, Sep 26 2011

Keywords

• nonn

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..226

Crossrefs

Column 7 of A196017.