Dirichlet convolution of b_n=2^(n-1) with c_n=3^(n-1).

Terms

a(0) =1a(1) =5a(2) =13a(3) =41a(4) =97a(5) =305a(6) =793a(7) =2393a(8) =6853a(9) =20405a(10) =60073a(11) =179957a(12) =535537a(13) =1604165a(14) =4799821a(15) =14386649a(16) =43112257a(17) =129286385a(18) =387682633a(19) =1162827737a(20) =3487836469a(21) =10462571525a(22) =31385253913a(23) =94151940581a(24) =282446314993a(25) =847323239045