A213471 Number of 0..3 arrays of length 2*n+6 with sum less than 3*n in any length 2n subsequence (=less than 50% duty cycle)

793, 65425, 1940673, 43399990, 836356119, 15103463125, 263422708979, 4498700185621, 75773483221458, 1264058518607488, 20939915070874170, 345057032966423355, 5662807472785412683, 92633089841621699568

Offset

1,1

Comments

Row 7 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....2....0....0....2....0
..0....0....0....0....2....2....0....0....2....0....0....2....2....0....0....0
..0....2....0....2....0....2....0....0....0....2....0....2....2....0....2....2
..0....2....0....2....0....2....0....2....2....0....2....2....0....2....0....0
..2....0....2....0....2....0....2....2....0....0....2....0....0....0....0....0
..3....1....1....0....0....1....0....0....1....2....0....0....0....1....0....0
..2....0....0....0....3....0....3....0....0....2....2....2....0....1....1....2
..0....0....0....3....0....1....3....1....2....0....0....1....2....1....0....2
..0....0....0....0....1....0....0....0....1....2....0....2....0....1....1....0
..0....1....2....2....1....3....0....0....0....0....2....0....3....2....2....0
..0....1....1....1....0....2....2....2....2....0....2....3....2....0....3....1
..1....1....0....2....3....0....0....1....1....3....0....0....0....3....0....0

Crossrefs

Sequence in context: A212239 A130555 A133537 * A075667 A136543 A133274

Adjacent sequences: A213468 A213469 A213470 * A213472 A213473 A213474

Keyword

nonn

Author

R. H. Hardin Jun 12 2012

Status

approved