A248997 Number of length n+4 0..4 arrays with no five consecutive terms having two times the sum of any three elements equal to three times the sum of the remaining two

2540, 10360, 42308, 172888, 706704, 2888944, 11810564, 48286456, 197422012, 807188768, 3300330556, 13494048552, 55173290154, 225588339824, 922369809354, 3771323457556, 15419939994758, 63048058448056, 257786893864722

Offset

1,1

Comments

Column 4 of A249001

Links

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

Example

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

Crossrefs

Sequence in context: A254021 A254014 A254888 * A234407 A135924 A250686

Adjacent sequences: A248994 A248995 A248996 * A248998 A248999 A249000

Keyword

nonn

Author

R. H. Hardin, Oct 18 2014

Status

approved