Numbers n such that n-1 is a divisor of 3^n + 5^n.

Terms

a(0) =2a(1) =3a(2) =5a(3) =9a(4) =18a(5) =39a(6) =153a(7) =222a(8) =378a(9) =630a(10) =1685a(11) =1749a(12) =3003a(13) =8178a(14) =10422a(15) =41310a(16) =70338a(17) =103833a(18) =141669a(19) =151590a(20) =285390a(21) =385578a(22) =542793a(23) =578589a(24) =804870a(25) =816750a(26) =950418a(27) =1105893a(28) =1132830a(29) =1583778