Sum of values of repunits of length n in base b representation with 1<b<=n+1.

A125120

Sum of values of repunits of length n in base b representation with 1<b<=n+1.

Terms

    a(0) =1a(1) =7a(2) =41a(3) =296a(4) =2829a(5) =34637a(6) =519049a(7) =9197344a(8) =188039787a(9) =4356087231a(10) =112754069273

External references