Number of terms of A061681 having length = n in decimal representation.
A130890
Number of terms of A061681 having length = n in decimal representation.
Terms
- a(0) =4a(1) =23a(2) =281a(3) =2825a(4) =28287a(5) =282890a(6) =2828964a(7) =28289682a(8) =282896825
External references
- oeis: A130890