A249262 Number of length 7+6 0..n arrays with every seven consecutive terms having five times the sum of some two elements equal to two times the sum of the remaining five

2, 395, 2048, 10673, 37442, 108563, 808062, 3740629, 13127340, 38825157, 94960850, 215453191, 424999552, 1008380863, 2063509454, 4039976617, 7165289688, 12299895523, 19709723854, 30865936641

Offset

1,1

Comments

Row 7 of A249255

Links

Table of n, a(n) for n=1..20.

Example

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

Crossrefs

Sequence in context: A249259 A249260 A249261 * A249172 A249173 A249174

Adjacent sequences: A249259 A249260 A249261 * A249263 A249264 A249265

Keyword

nonn

Author

R. H. Hardin, Oct 23 2014

Status

approved