A241330 Number of 3Xn 0..3 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..3 introduced in row major order.

5, 85, 2344, 68935, 2034543, 60066019, 1773370241, 52356524981, 1545760698649, 45636645554004, 1347364712395962, 39779252976746762, 1174432544392935470, 34673647645893709738, 1023695951556996550068, 30223338828856554979455

Offset: 1

Author

R. H. Hardin, Apr 19 2014

Keywords

• nonn

Comments

Row 3 of A241328

Examples

			Some solutions for n=4
..0..1..0..2....0..1..2..1....0..1..2..1....0..1..0..1....0..1..2..3
..0..1..1..2....3..1..3..2....3..0..3..0....2..3..1..1....1..1..3..2
..1..3..1..0....1..0..3..1....0..2..1..3....1..3..1..0....1..0..1..3
		

Links

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

Formula

Empirical: a(n) = 31*a(n-1) -26*a(n-2) -530*a(n-3) +271*a(n-4) +1431*a(n-5) +437*a(n-6) +157*a(n-7) -438*a(n-8) -846*a(n-9) -243*a(n-10) -243*a(n-11) for n>13