A248467 Number of length 6+2 0..n arrays with no three consecutive terms having the sum of any two elements equal to twice the third

68, 576, 14040, 96736, 520788, 1952254, 6493036, 17917712, 45541888, 102869198, 219106196, 433633802, 820820502, 1471721904, 2552955354, 4256615846, 6910769098, 10880058248, 16766422418, 25217401274, 37267800170, 53987521754

Offset

1,1

Comments

Row 6 of A248461

Links

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

Example

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

Crossrefs

Sequence in context: A032510 A211691 A027850 * A281565 A281883 A282333

Adjacent sequences: A248464 A248465 A248466 * A248468 A248469 A248470

Keyword

nonn

Author

R. H. Hardin, Oct 06 2014

Status

approved