A212237 Number of 0..2 arrays of length 4+2*n with sum no more than 2*n in any length 2n subsequence (=50% duty cycle)

157, 1895, 19834, 191853, 1804448, 16740414, 154089343, 1411275807, 12881812440, 117296944044, 1066131740757, 9676805664696, 87736143094569, 794774081112347, 7194441026799642, 65086616352089797, 588530376516453384

Offset

1,1

Comments

Row 5 of A212232

Links

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

Example

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

Crossrefs

Sequence in context: A258436 A167992 A038493 * A078964 A171345 A327849

Adjacent sequences: A212234 A212235 A212236 * A212238 A212239 A212240

Keyword

nonn

Author

R. H. Hardin May 06 2012

Status

approved