Number of 8's when k is written in base b for all b and k satisfying 2<=b<=n+1, 1<=k<=n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =1a(8) =1a(9) =1a(10) =1a(11) =1a(12) =1a(13) =1a(14) =1a(15) =1a(16) =2a(17) =3a(18) =4a(19) =5a(20) =6a(21) =7a(22) =8a(23) =9a(24) =10a(25) =12a(26) =13a(27) =15a(28) =16a(29) =18