Number of 5'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) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =2a(11) =3a(12) =4a(13) =5a(14) =6a(15) =7a(16) =9a(17) =10a(18) =12a(19) =13a(20) =15a(21) =16a(22) =19a(23) =20a(24) =22a(25) =24a(26) =26a(27) =27a(28) =31a(29) =33