A249287 Number of length n+3 0..5 arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.

1098, 5646, 29100, 150112, 774542, 3996816, 20626236, 106449362, 549377682, 2835311880, 14632955578, 75520363990, 389759189220, 2011540365174, 10381526171750, 53578887648690, 276519776741626, 1427114135562896

Offset: 1

Author

R. H. Hardin, Oct 24 2014

Keywords

• nonn

Comments

Column 5 of A249290

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 87

Formula

Empirical recurrence of order 87 (see link above)