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A213465
Number of 0..3 arrays of length 2*n with sum less than 3*n in any length 2n subsequence (=less than 50% duty cycle)
1
6, 106, 1758, 28722, 466136, 7536790, 121573668, 1957953138, 31497261096, 506264941416, 8132104116670, 130559338628190, 2095252193645448, 33614011364219588, 539119053140521448, 8644670545679274098
OFFSET
1,1
COMMENTS
Row 1 of A213464
LINKS
EXAMPLE
Some solutions for n=3
..0....1....2....1....2....1....0....1....3....0....2....1....3....0....3....2
..2....2....1....2....0....1....2....1....2....2....0....2....0....1....0....0
..0....1....1....0....0....1....1....0....1....3....2....3....1....3....1....0
..0....1....1....1....1....2....0....2....0....1....3....1....0....0....3....1
..0....2....1....2....0....0....3....2....1....2....0....1....0....2....0....2
..2....1....0....0....3....3....0....2....0....0....0....0....1....2....0....1
CROSSREFS
Sequence in context: A376331 A055763 A213464 * A214349 A305134 A083432
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 12 2012
STATUS
approved