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

1,1

Comments

Row 4 of A249001

Links

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

Example

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

Crossrefs

Sequence in context: A017055 A299859 A017139 * A249470 A251359 A251352

Adjacent sequences: A249002 A249003 A249004 * A249006 A249007 A249008

Keyword

nonn

Author

R. H. Hardin, Oct 18 2014

Status

approved