A248544 Number of length 7+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, 197, 762, 1635, 4424, 9681, 18006, 27031, 39712, 58889, 84802, 114305, 150856, 198147, 256038, 321105, 396728, 485607, 591270, 706739, 836684, 996031, 1169410, 1356535, 1566720, 1801223, 2055290, 2322411, 2610784, 2932121, 3284562

Offset

1,1

Comments

Row 7 of A248537

Links

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

Example

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

Crossrefs

Sequence in context: A248541 A248542 A248543 * A344819 A015520 A098520

Adjacent sequences: A248541 A248542 A248543 * A248545 A248546 A248547

Keyword

nonn

Author

R. H. Hardin, Oct 08 2014

Status

approved