A249080 Number of length n+5 0..3 arrays with every six consecutive terms having two times the sum of some two elements equal to the sum of the remaining four

1324, 1944, 2844, 4136, 5964, 8504, 11964, 18884, 29484, 45428, 68892, 102564, 149644, 243804, 391596, 618620, 958668, 1453724, 2153964, 3554444, 5775660, 9219020, 14417004, 22033164, 32862124, 54520044, 89029164, 142746476

Offset

1,1

Comments

Column 3 of A249085

Links

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

Formula

Empirical: a(n) = a(n-1) +30*a(n-6) -30*a(n-7) -280*a(n-12) +280*a(n-13) +960*a(n-18) -960*a(n-19) -1024*a(n-24) +1024*a(n-25)

Example

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

Crossrefs

Sequence in context: A186469 A145754 A020403 * A248984 A202374 A259415

Adjacent sequences: A249077 A249078 A249079 * A249081 A249082 A249083

Keyword

nonn

Author

R. H. Hardin, Oct 20 2014

Status

approved