A213470 Number of 0..3 arrays of length 2*n+5 with sum less than 3*n in any length 2n subsequence (=less than 50% duty cycle)

353, 22506, 615561, 12773955, 237475982, 4198162231, 72188618371, 1220298706370, 20395481622380, 338170996357600, 5574396540683306, 91481580201645051, 1496133943774251078, 24401386122053197406

Offset

1,1

Comments

Row 6 of A213464

Links

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

Example

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

Crossrefs

Sequence in context: A262205 A126113 A282998 * A068684 A377219 A270782

Adjacent sequences: A213467 A213468 A213469 * A213471 A213472 A213473

Keyword

nonn

Author

R. H. Hardin Jun 12 2012

Status

approved