a(n)/10000000 gives log_10(n) to 7 places.

Terms

a(0) =0a(1) =3010300a(2) =4771213a(3) =6020600a(4) =6989700a(5) =7781513a(6) =8450980a(7) =9030900a(8) =9542425a(9) =10000000a(10) =10413927a(11) =10791812a(12) =11139434a(13) =11461280a(14) =11760913a(15) =12041200a(16) =12304489a(17) =12552725a(18) =12787536a(19) =13010300a(20) =13222193a(21) =13424227a(22) =13617278