a(n) = 1 + prime(n) + prime(n)^2 + prime(n)^3.

Terms

a(0) =15a(1) =40a(2) =156a(3) =400a(4) =1464a(5) =2380a(6) =5220a(7) =7240a(8) =12720a(9) =25260a(10) =30784a(11) =52060a(12) =70644a(13) =81400a(14) =106080a(15) =151740a(16) =208920a(17) =230764a(18) =305320a(19) =363024a(20) =394420a(21) =499360a(22) =578760a(23) =712980a(24) =922180a(25) =1040604a(26) =1103440a(27) =1236600a(28) =1307020a(29) =1455780