A248466 Number of length 5+2 0..n arrays with no three consecutive terms having the sum of any two elements equal to twice the third

42, 288, 4488, 24160, 105026, 332940, 948412, 2299356, 5183202, 10554328, 20406996, 37023484, 64595054, 107536496, 173894220, 271712160, 414759462, 616455068, 899198128, 1284256968, 1806180638, 2496566424, 3406477720

Offset

1,1

Comments

Row 5 of A248461

Links

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

Example

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

Crossrefs

Sequence in context: A188058 A036463 A190534 * A233407 A272139 A167654

Adjacent sequences: A248463 A248464 A248465 * A248467 A248468 A248469

Keyword

nonn

Author

R. H. Hardin, Oct 06 2014

Status

approved