Dirichlet convolution of 3^(n-1) with primes (with 1).

Terms

a(0) =1a(1) =5a(2) =12a(3) =38a(4) =88a(5) =281a(6) =742a(7) =2273a(8) =6607a(9) =19889a(10) =59078a(11) =177823a(12) =531478a(13) =1595861a(14) =4783318a(15) =14353514a(16) =43046774a(17) =129154229a(18) =387420550a(19) =1162301563a(20) =3486786776a(21) =10460471461a(22) =31381059688a(23) =94143541523a(24) =282429537137a(25) =847289672533