A280960 Number of nX7 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

224, 23593, 402077, 9986376, 251270618, 6052621154, 148137367471, 3624578433814, 88500510514256, 2162800206884214, 52848406746190667, 1291317121466531838, 31553229218022226192, 770996700142671487457

Offset: 1

Author

R. H. Hardin, Jan 11 2017

Keywords

• nonn

Comments

Column 7 of A280961.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..62

Crossrefs

Cf. A280961.