A248541 Number of length 4+3 0..n arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth

2, 15, 52, 137, 378, 715, 1412, 2535, 4142, 5939, 8300, 11457, 15402, 19957, 25368, 31937, 39658, 48283, 58104, 69315, 82022, 95815, 111160, 129001, 148166, 168873, 191572, 216629, 243618, 272009, 302380, 335677, 371566, 409531, 449256, 492885

Offset

1,1

Comments

Row 4 of A248537

Links

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

Example

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

Crossrefs

Sequence in context: A248539 A248540 A007972 * A248542 A248543 A248544

Adjacent sequences: A248538 A248539 A248540 * A248542 A248543 A248544

Keyword

nonn

Author

R. H. Hardin, Oct 08 2014

Status

approved