A239153 Number of (n+1)X(4+1) 0..3 arrays with no element equal to all horizontal neighbors or unequal to all vertical neighbors, and new values 0..3 introduced in row major order.

24, 24, 12159, 135766, 12844591, 330311070, 18120156500, 629468400383, 28646802159654, 1108832844851022, 47257467282260746, 1901383445656471050, 79172996011297669608, 3229805113653824580575, 133380680053667604594194

Offset: 1

Author

R. H. Hardin, Mar 11 2014

Keywords

• nonn

Comments

Column 4 of A239155

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..55