A249978 Number of length n+1 0..2 X 4 arrays with the sum of the absolute values of adjacent differences equal to n*4.

10, 64, 426, 3030, 22560, 168506, 1293326, 9937894, 77372824, 604180880, 4749038012, 37448196486, 296429721556, 2352824897458, 18723425845436, 149319341015310, 1193131013642304, 9549922015472032, 76554889282313192

Offset: 1

Author

R. H. Hardin, Nov 10 2014

Keywords

• nonn

Comments

Column 4 of A249982

Examples

			Some solutions for n=6
..4....0....1....0....0....0....3....2....0....2....1....2....1....3....2....1
..1....2....8....7....7....3....8....8....4....0....1....8....3....0....8....6
..5....3....6....6....0....3....2....4....3....8....6....3....6....6....0....1
..3....8....7....3....0....8....0....2....0....0....3....1....1....0....3....6
..8....2....6....7....4....5....8....0....7....3....0....2....0....7....7....1
..2....8....0....8....8....0....8....6....3....3....7....0....8....6....5....4
..6....4....7....0....6....8....5....2....8....0....1....8....3....5....6....3
		

Links

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