A248984 Number of length n+4 0..5 arrays with every five consecutive terms having two times the sum of some three elements equal to three times the sum of the remaining two

1326, 1654, 2042, 2494, 3014, 3606, 4742, 6130, 7782, 9710, 11926, 16166, 21426, 27758, 35214, 43846, 60294, 80882, 105830, 135358, 169686, 234886, 316898, 416654, 535086, 673126, 934566, 1264322, 1666342, 2144574, 2702966, 3757734, 5090290

Offset

1,1

Comments

Column 5 of A248987

Links

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

Formula

Empirical: a(n) = a(n-1) +10*a(n-5) -10*a(n-6) -31*a(n-10) +31*a(n-11) +26*a(n-15) -26*a(n-16) +8*a(n-20) -8*a(n-21)

Example

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

Crossrefs

Sequence in context: A145754 A020403 A249080 * A202374 A259415 A015162

Adjacent sequences: A248981 A248982 A248983 * A248985 A248986 A248987

Keyword

nonn

Author

R. H. Hardin, Oct 18 2014

Status

approved