Number of pairs of terms of the sequence A237929 less than 10^n.
A243902
Number of pairs of terms of the sequence A237929 less than 10^n.
Terms
- a(0) =2a(1) =3a(2) =4a(3) =9a(4) =18a(5) =45a(6) =146a(7) =469a(8) =1655a(9) =6095a(10) =23775
External references
- oeis: A243902