a(1) = 1 and then smallest n-digit triangular number starting with the least significant digit of the previous term and not a multiple of 10.
A077206
a(1) = 1 and then smallest n-digit triangular number starting with the least significant digit of the previous term and not a multiple of 10.
Terms
- a(0) =1a(1) =15a(2) =528a(3) =8001a(4) =10011a(5) =100128a(6) =8006001a(7) =10001628a(8) =800060001a(9) =1000006281a(10) =10000020331a(11) =100000404505
External references
- oeis: A077206