A249288 Number of length n+3 0..6 arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth

2070, 12600, 76856, 469072, 2863158, 17477172, 106687006, 651265876, 3975630136, 24269116850, 148150208272, 904379542250, 5520764471064, 33701382275398, 205729331323368, 1255870097060206, 7666430906270386, 46799555928424622

Offset

1,1

Comments

Column 6 of A249290

Links

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

Example

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

Crossrefs

Sequence in context: A256744 A015993 A065217 * A200829 A035871 A221052

Adjacent sequences: A249285 A249286 A249287 * A249289 A249290 A249291

Keyword

nonn

Author

R. H. Hardin, Oct 24 2014

Status

approved