a(1) = 1, a(n) = smallest triangular number of the form k*a(n-1) + 1 for some positive integer k.
A068082
a(1) = 1, a(n) = smallest triangular number of the form k*a(n-1) + 1 for some positive integer k.
Terms
- a(0) =1a(1) =3a(2) =10a(3) =21a(4) =190a(5) =1711a(6) =15400a(7) =138601a(8) =1247410a(9) =11226691a(10) =101040220a(11) =909361981a(12) =8184257830a(13) =73658320471a(14) =662924884240
External references
- oeis: A068082