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 A034735 Dirichlet convolution of b_n=2^(n-1) with c_n=3^(n-1). 2
 1, 5, 13, 41, 97, 305, 793, 2393, 6853, 20405, 60073, 179957, 535537, 1604165, 4799821, 14386649, 43112257, 129286385, 387682633, 1162827737, 3487836469, 10462571525, 31385253913, 94151940581, 282446314993, 847323239045, 2541932965741, 7625734923497, 22877060890417 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Robert Israel, Table of n, a(n) for n = 1..2094 FORMULA a(n) ~ 3^(n-1). - Vaclav Kotesovec, Sep 11 2019 MAPLE f:= n -> add(2^d * 3^(n/d)/6, d = numtheory:-divisors(n)): map(f, [\$1..50]); # Robert Israel, Jun 25 2020 MATHEMATICA Table[Sum[2^(d - 1)*3^(n/d - 1), {d, Divisors[n]}], {n, 1, 30}] (* Vaclav Kotesovec, Sep 11 2019 *) PROG (PARI) a(n) = sumdiv(n, d, 2^(d-1) * 3^(n/d-1) ); /* Joerg Arndt, Apr 14 2013 */ CROSSREFS Cf. A038039. Sequence in context: A322155 A100210 A080267 * A305464 A200150 A287017 Adjacent sequences:  A034732 A034733 A034734 * A034736 A034737 A034738 KEYWORD nonn AUTHOR STATUS approved

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Last modified August 7 17:44 EDT 2020. Contains 336278 sequences. (Running on oeis4.)