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A032127 "BIK" (reversible, indistinct, unlabeled) transform of 1,3,5,7... 0
1, 4, 9, 25, 63, 183, 513, 1521, 4455, 13311, 39609, 118665, 355023, 1064583, 3190833, 9571041, 28704375, 86108751, 258300009, 774886905, 2324581983, 6973706583, 20920883553, 62762532561, 188286889095, 564860312991 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

LINKS

C. G. Bower, Transforms (2)

FORMULA

For n>2, a(n) = (1/9)*{(8-(-1)^n)*3^[n/2] + 2*3^n}. - R. Stephan, May 11 2004

CROSSREFS

Sequence in context: A068888 A030481 A160190 * A181357 A175627 A007598

Adjacent sequences:  A032124 A032125 A032126 * A032128 A032129 A032130

KEYWORD

nonn

AUTHOR

Christian G. Bower (bowerc(AT)usa.net)

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.