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A212472 Number of 0..3 arrays of length 2*n with sum no more than 3*n in any length 2n subsequence (=50% duty cycle) 1
10, 150, 2338, 36814, 582440, 9240426, 146861788, 2337014158, 37222215640, 593246686360, 9460081927746, 150915638082466, 2408347433725048, 38443582673708348, 613802451466325528, 9802073528030277518 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 1 of A212471

LINKS

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

EXAMPLE

Some solutions for n=3

..0....1....2....1....3....1....0....0....1....3....3....1....3....2....1....0

..3....3....1....0....3....0....1....3....2....0....1....1....3....0....1....3

..1....2....0....3....1....0....2....0....0....3....1....3....0....0....1....2

..2....2....3....1....0....3....0....3....0....1....1....0....2....1....2....0

..0....0....0....1....0....2....1....1....2....0....3....1....0....3....3....0

..3....0....1....1....2....2....0....2....1....0....0....2....1....3....0....0

CROSSREFS

Sequence in context: A157867 A116156 A224124 * A025750 A034325 A239620

Adjacent sequences:  A212469 A212470 A212471 * A212473 A212474 A212475

KEYWORD

nonn

AUTHOR

R. H. Hardin May 17 2012

STATUS

approved

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Last modified May 23 11:05 EDT 2019. Contains 323513 sequences. (Running on oeis4.)