A247531 Number of length n+3 0..6 arrays with some disjoint pairs in every consecutive four terms having the same sum.

553, 1033, 2009, 3997, 8051, 16683, 34695, 72269, 150677, 318575, 671847, 1413661, 2970293, 6314241, 13372035, 28225763, 59454011, 126633283, 268599173, 567619549, 1196758327, 2551010159, 5414437825, 11447235523, 24144688307

Offset: 1

Author

R. H. Hardin, Sep 18 2014

Keywords

• nonn

Comments

Column 6 of A247533

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 82

Formula

Empirical recurrence of order 82 (see link above)