A248543 Number of length 6+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, 173, 594, 1219, 2960, 6069, 10858, 16099, 23300, 33707, 47400, 63085, 82288, 106583, 135878, 168791, 206738, 250813, 302416, 358755, 422014, 498189, 580572, 669539, 768718, 878929, 998028, 1123317, 1258070, 1407363, 1570088

Offset

1,1

Comments

Row 6 of A248537

Links

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

Example

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

Crossrefs

Sequence in context: A007972 A248541 A248542 * A248544 A344819 A015520

Adjacent sequences: A248540 A248541 A248542 * A248544 A248545 A248546

Keyword

nonn

Author

R. H. Hardin, Oct 08 2014

Status

approved