a(n) = Tau(N), where N = the number obtained as a concatenation of 9801 with itself n times. Tau(n) = number of divisors of n.
A110755
a(n) = Tau(N), where N = the number obtained as a concatenation of 9801 with itself n times. Tau(n) = number of divisors of n.
Terms
- a(0) =15a(1) =60a(2) =288a(3) =240a(4) =480a(5) =2304a(6) =960a(7) =7680a(8) =5376a(9) =7680a(10) =5120a(11) =18432a(12) =1920a(13) =15360a(14) =2359296a(15) =122880a(16) =3840a(17) =344064a(18) =240a(19) =122880a(20) =7077888a(21) =81920a(22) =3840a(23) =9437184a(24) =491520a(25) =30720a(26) =786432a(27) =491520a(28) =30720a(29) =150994944
External references
- oeis: A110755