A249199 Number of length 2+6 0..n arrays with no seven consecutive terms having four times the sum of any three elements equal to three times the sum of the remaining four

250, 4586, 49730, 290032, 1249890, 4264120, 12523980, 32265528, 75291612, 161899248, 326111182, 620196140, 1126624828, 1965081086, 3308353438, 5396340806, 8563365532, 13250164542, 20059918926, 29755741666, 43364729550

Offset

1,1

Comments

Row 2 of A249197

Links

R. H. Hardin, Table of n, a(n) for n = 1..24

Example

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

Crossrefs

Sequence in context: A122270 A234497 A234491 * A249214 A249321 A109121

Adjacent sequences: A249196 A249197 A249198 * A249200 A249201 A249202

Keyword

nonn

Author

R. H. Hardin, Oct 23 2014

Status

approved