A249005 Number of length 4+4 0..n arrays with no five consecutive terms having two times the sum of any three elements equal to three times the sum of the remaining two.

216, 2802, 28240, 172888, 822348, 2865126, 8902860, 23177368, 55906496, 122921570, 254998668, 492803174, 916912140, 1618570176, 2775224082, 4580364152, 7372967710, 11513855042, 17636594106, 26371506592, 38792087628

Offset: 1

Author

R. H. Hardin, Oct 18 2014

Keywords

• nonn

Comments

Row 4 of A249001

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..69