A249977 Number of length n+1 0..2*3 arrays with the sum of the absolute values of adjacent differences equal to n*3

8, 42, 208, 1242, 6856, 43068, 245860, 1589346, 9213728, 60568000, 354452340, 2354520904, 13870730416, 92791873776, 549357227852, 3693928360378, 21952690573088, 148190103229340, 883335481978896, 5981390826179620

Offset

1,1

Comments

Column 3 of A249982

Links

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

Example

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

Crossrefs

Sequence in context: A171478 A352626 A276265 * A037710 A037612 A346980

Adjacent sequences: A249974 A249975 A249976 * A249978 A249979 A249980

Keyword

nonn

Author

R. H. Hardin, Nov 10 2014

Status

approved