a(1) = 0; for n > 1, a(n) = Product_{d|n, d>1, d<n} prime(1+A297167(d)).

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =1a(5) =6a(6) =1a(7) =6a(8) =3a(9) =10a(10) =1a(11) =54a(12) =1a(13) =14a(14) =15a(15) =30a(16) =1a(17) =90a(18) =1a(19) =150a(20) =21a(21) =22a(22) =1a(23) =1350a(24) =5a(25) =26a(26) =15a(27) =294a(28) =1a(29) =2250