A212478 Number of 0..3 arrays of length 2*n+6 with sum no more than 3*n in any length 2n subsequence (=50% duty cycle)

5864, 172980, 3708268, 70600212, 1246724695, 21292987433, 357117150362, 5923063781205, 97514964737576, 1597131825489558, 26058934302628094, 423954039651724411, 6881835973423757103, 111509561797692820078

Offset

1,1

Comments

Row 7 of A212471

Links

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

Example

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

Crossrefs

Sequence in context: A272324 A104927 A183843 * A333232 A053340 A291597

Adjacent sequences: A212475 A212476 A212477 * A212479 A212480 A212481

Keyword

nonn

Author

R. H. Hardin May 17 2012

Status

approved