Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS". Other ways to donate

1,2

Table of n, a(n) for n=1..72.

If n = 2^m*(2t+1) then a(n) = (3^(m+1)-2^(m+1))*3^wt(t) where wt() = A000120().

Cf. A169689. Bisections: A048883, A169698.

Sequence in context: A133172 A075453 A073845 * A092525 A101367 A256565

Adjacent sequences: A169694 A169695 A169696 * A169698 A169699 A169700

nonn

N. J. A. Sloane, Apr 15 2010

approved