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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 1 of A213464

LINKS

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

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: A075068 A055763 A213464 * A214349 A305134 A083432

Adjacent sequences:  A213462 A213463 A213464 * A213466 A213467 A213468

KEYWORD

nonn

AUTHOR

R. H. Hardin Jun 12 2012

STATUS

approved

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Last modified August 3 14:46 EDT 2020. Contains 336198 sequences. (Running on oeis4.)