a(1) = 1, a(n+1) = Sum_{k = 1..n} p(k)*a(n+1-k), where p(k) is the k-th prime.

A030017

a(1) = 1, a(n+1) = Sum_{k = 1..n} p(k)*a(n+1-k), where p(k) is the k-th prime.

Terms

    a(0) =1a(1) =2a(2) =7a(3) =25a(4) =88a(5) =311a(6) =1095a(7) =3858a(8) =13591a(9) =47881a(10) =168688a(11) =594289a(12) =2093693a(13) =7376120a(14) =25986209a(15) =91549913a(16) =322532092a(17) =1136286727a(18) =4003159847a(19) =14103208628a(20) =49685873471a(21) =175044281583a(22) =616684348614

External references