Sum of the divisors of 5^n+1.

Terms

a(0) =3a(1) =12a(2) =42a(3) =312a(4) =942a(5) =6264a(6) =25284a(7) =162000a(8) =620460a(9) =4961280a(10) =16161768a(11) =103442688a(12) =367381884a(13) =2441936064a(14) =9859525284a(15) =76963663296a(16) =228970112844