A249653 Number of length n+4 0..5 arrays with every five consecutive terms having four times some element equal to the sum of the remaining four

1046, 1218, 1408, 1620, 1858, 2126, 2590, 3132, 3764, 4498, 5346, 6778, 8510, 10594, 13082, 16026, 20906, 26980, 34468, 43590, 54566, 72558, 95404, 124036, 159386, 202386, 272426, 362494, 476538, 618506, 792346, 1074554, 1440204, 1906020

Offset

1,1

Comments

Column 5 of A249656

Links

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

Formula

Empirical: a(n) = a(n-1) +9*a(n-5) -9*a(n-6) -26*a(n-10) +26*a(n-11) +25*a(n-15) -25*a(n-16) -a(n-20) +a(n-21) -2*a(n-25) +2*a(n-26)

Example

Some solutions for n=6
..3....4....1....4....4....0....5....2....4....3....3....5....0....0....0....4
..5....2....1....2....0....4....2....2....2....3....2....5....0....5....0....2
..5....5....2....1....3....3....0....0....0....0....2....3....0....2....2....3
..3....5....3....0....2....5....1....3....2....4....4....4....4....3....5....2
..4....4....3....3....1....3....2....3....2....5....4....3....1....0....3....4
..3....4....1....4....4....5....0....2....4....3....3....0....0....5....0....4
..5....2....1....2....0....4....2....2....2....3....2....5....0....0....5....2
..0....5....2....1....3....3....5....5....0....0....2....3....0....2....2....3
..3....5....3....5....2....0....1....3....2....4....4....4....4....3....0....2
..4....4....3....3....1....3....2....3....2....5....4....3....1....0....3....4

Crossrefs

Sequence in context: A110597 A258130 A226114 * A056092 A280809 A252307

Adjacent sequences: A249650 A249651 A249652 * A249654 A249655 A249656

Keyword

nonn

Author

R. H. Hardin, Nov 03 2014

Status

approved