Primes from integers by taking the factorial of each digit and adding them up.

Terms

a(0) =2a(1) =2a(2) =2a(3) =3a(4) =7a(5) =3a(6) =3a(7) =7a(8) =7a(9) =3a(10) =3a(11) =3a(12) =3a(13) =5a(14) =13a(15) =31a(16) =127a(17) =727a(18) =31a(19) =127a(20) =241a(21) =727a(22) =45361a(23) =45361a(24) =5a(25) =5a(26) =5a(27) =5a(28) =13a(29) =31