a(n) = Product_{d|n, d>1} prime(1+(d mod 8)).

Terms

a(0) =1a(1) =5a(2) =7a(3) =55a(4) =13a(5) =595a(6) =19a(7) =110a(8) =21a(9) =325a(10) =7a(11) =71995a(12) =13a(13) =1615a(14) =1729a(15) =220a(16) =3a(17) =8925a(18) =7a(19) =39325a(20) =1729a(21) =595a(22) =19a(23) =287980a(24) =39a(25) =325a(26) =147a(27) =195415a(28) =13a(29) =12492025