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A250135 Number of length n+2 0..3 arrays with the medians of every three consecutive terms nondecreasing 1
64, 204, 632, 1959, 5696, 16104, 45232, 124249, 335328, 897523, 2377452, 6233295, 16229424, 41987965, 107948004, 276101588, 703049528, 1782693579, 4503485124, 11339512465, 28466148864, 71263715430, 177963467480, 443410709998 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A250140

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-1) -6*a(n-2) +24*a(n-3) -57*a(n-4) +52*a(n-5) -170*a(n-6) +256*a(n-7) -98*a(n-8) +560*a(n-9) -340*a(n-10) -80*a(n-11) -977*a(n-12) -372*a(n-13) +48*a(n-14) +624*a(n-15) +788*a(n-16) +192*a(n-17) -96*a(n-18) -288*a(n-19) -144*a(n-20)

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A220763 A030028 A320338 * A273321 A091077 A245991

Adjacent sequences:  A250132 A250133 A250134 * A250136 A250137 A250138

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 13 2014

STATUS

approved

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Last modified July 22 10:03 EDT 2019. Contains 325219 sequences. (Running on oeis4.)