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A032098 "BHK" (reversible, identity, unlabeled) transform of 3,3,3,3... 0
3, 6, 21, 87, 363, 1491, 6051, 24387, 97923, 392451, 1571331, 6288387, 25159683, 100651011, 402628611, 1610563587, 6442352643, 25769607171, 103078821891, 412316073987, 1649265868803, 6597066620931 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..22.

C. G. Bower, Transforms (2)

FORMULA

Conjecture: a(n) = 3 * (2^(2n-3) - 2^(n-2) + 1). - Ralf Stephan, Sep 11 2003

Conjecture: a(n) = 7*a(n-1)-14*a(n-2)+8*a(n-3). G.f.: 3*x*(1-5*x+7*x^2)/((1-x)*(1-2*x)*(1-4*x)). - Colin Barker, Sep 22 2012

CROSSREFS

Sequence in context: A151961 A025229 A073951 * A292066 A019053 A019054

Adjacent sequences:  A032095 A032096 A032097 * A032099 A032100 A032101

KEYWORD

nonn

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified February 25 03:06 EST 2018. Contains 299630 sequences. (Running on oeis4.)