A213469 Number of 0..3 arrays of length 2*n+4 with sum less than 3*n in any length 2n subsequence (=less than 50% duty cycle)

157, 7803, 191573, 3737885, 67329406, 1167362677, 19808276303, 331605526490, 5501075085468, 90671574326172, 1487390263956378, 24310876230706073, 396224883822318038, 6443121835406288422, 104579933906413425698

Offset

1,1

Comments

Row 5 of A213464

Links

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

Example

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

Crossrefs

Sequence in context: A171345 A327849 A066823 * A074220 A015265 A260447

Adjacent sequences: A213466 A213467 A213468 * A213470 A213471 A213472

Keyword

nonn

Author

R. H. Hardin Jun 12 2012

Status

approved