Total number of positive integers < 10^n with multiplicative digital root value 2.
A263471
Total number of positive integers < 10^n with multiplicative digital root value 2.
Terms
- a(0) =1a(1) =9a(2) =77a(3) =543a(4) =3213a(5) =16673a(6) =86093a(7) =503815a(8) =3529057a(9) =25402097a(10) =162303510a(11) =884504882a(12) =4156234265a(13) =17270407962a(14) =65375131342a(15) =232901619970a(16) =807191392546
External references
- oeis: A263471