Position of first occurrence of n different digits in the number E.
1, 1, 1, 1, 1, 9, 9, 19, 19, 231, 1730
0
T. D. Noe, Plot of 11 terms
(Mma) Flatten[Table[Position[Length /@ Union /@ Partition[RealDigits[E, 10, 10000][[1]], n, 1], n, 1, 1], {n, 0, 10}]]
Cf. S000689.
nonn,base,fini,full
T. D. Noe, Jul 20 2015