A248990 Number of length 3+4 0..n arrays with every five consecutive terms having two times the sum of some three elements equal to three times the sum of the remaining two

2, 53, 204, 585, 2042, 6065, 12644, 24583, 40878, 72399, 115668, 180421, 260514, 371185, 521910, 723925, 962888, 1263913, 1604166, 2067027, 2592298, 3230455, 3942088, 4781303, 5766434, 6934955, 8208132, 9682923, 11277354, 13209205

Offset

1,1

Comments

Row 3 of A248987

Links

R. H. Hardin, Table of n, a(n) for n = 1..147

Example

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

Crossrefs

Sequence in context: A364080 A248988 A248989 * A248991 A248992 A248993

Adjacent sequences: A248987 A248988 A248989 * A248991 A248992 A248993

Keyword

nonn

Author

R. H. Hardin, Oct 18 2014

Status

approved