Number of positive integers <= 10^n that are divisible by no prime exceeding 5.

Terms

a(0) =1a(1) =9a(2) =34a(3) =86a(4) =175a(5) =313a(6) =507a(7) =768a(8) =1105a(9) =1530a(10) =2053a(11) =2683a(12) =3429a(13) =4301a(14) =5310a(15) =6466a(16) =7780a(17) =9259a(18) =10917a(19) =12761a(20) =14801a(21) =17048a(22) =19511a(23) =22201a(24) =25127a(25) =28300a(26) =31730a(27) =35425a(28) =39397a(29) =43654