A249173 Number of length 2+6 0..n arrays with every seven consecutive terms having four times the sum of some three elements equal to three times the sum of the remaining four

2, 395, 2258, 11177, 39066, 115437, 354572, 920337, 2088652, 4325029, 8248606, 14889789, 25395692, 43971071, 72461790, 114932123, 175804156, 261631751, 378607326, 536343367, 761825382, 1059711829, 1446131636, 1941874063

Offset

1,1

Comments

Row 2 of A249171

Links

R. H. Hardin, Table of n, a(n) for n = 1..31

Example

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

Crossrefs

Sequence in context: A249261 A249262 A249172 * A249174 A249175 A249176

Adjacent sequences: A249170 A249171 A249172 * A249174 A249175 A249176

Keyword

nonn

Author

R. H. Hardin, Oct 22 2014

Status

approved