A249297 Number of length 7+3 0..n arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth

548, 18232, 237480, 3164312, 20626236, 106687006, 446465388, 1564897170, 4760601928, 13086372374, 32599885184, 75623146588, 164589989052, 338640259244, 663790705232, 1250055198186, 2264746878484, 3971666747616

Offset

1,1

Comments

Row 7 of A249290

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A015324 A103537 A136928 * A245957 A352543 A206506

Adjacent sequences: A249294 A249295 A249296 * A249298 A249299 A249300

Keyword

nonn

Author

R. H. Hardin, Oct 24 2014

Status

approved