A184670 Number of (n+1)X7 0..3 arrays with no 2X2 subblock summing to less than 6.

27278035, 117938741095, 402221585928132, 1498459859767029015, 5429971895805945122143, 19869188673828370548366580, 72469574283521150229737165516, 264615725211389828099780842721919

Offset: 1

Author

R. H. Hardin Jan 19 2011

Keywords

• nonn

Comments

Column 6 of A184673

Examples

			Some solutions for 3X7
..0..0..0..2..0..1..1....0..0..0..0..2..1..2....0..0..0..2..2..2..3
..3..3..3..2..3..2..2....3..3..3..3..2..3..0....3..3..3..2..0..3..2
..0..0..0..1..2..2..2....0..0..0..0..3..3..2....0..0..0..3..3..2..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..58