Number of k < 10^n such that A047988(k) = 2.
A213531
Number of k < 10^n such that A047988(k) = 2.
Terms
- a(0) =0a(1) =11a(2) =201a(3) =2592a(4) =29916a(5) =328988a(6) =3550745a(7) =37432690a(8) =390065916a(9) =4034529147a(10) =41532029309a(11) =425608837164
External references
- oeis: A213531