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

1,1

Comments

Column 5 of A249290

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)

Example

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

Crossrefs

Sequence in context: A123366 A186476 A096926 * A252418 A261911 A276708

Adjacent sequences: A249284 A249285 A249286 * A249288 A249289 A249290

Keyword

nonn

Author

R. H. Hardin, Oct 24 2014

Status

approved