A249256 Number of length 1+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, 270404, 609527, 1237610, 2376889, 4234788, 7276359, 11852610, 18815693, 28658380, 42880029, 62083718, 88666639, 123361020, 169804397, 228699934, 305499203, 400668852, 521940563, 669511918, 853960505

Offset

1,1

Comments

Row 1 of A249255.

Links

R. H. Hardin, Table of n, a(n) for n = 1..42

Example

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

Crossrefs

Cf. A249255.

Sequence in context: A249364 A249365 A249366 * A249257 A249258 A249259

Adjacent sequences: A249253 A249254 A249255 * A249257 A249258 A249259

Keyword

nonn

Author

R. H. Hardin, Oct 23 2014

Status

approved