Number of positive integers <= 10^n that are divisible by no prime exceeding 7.

Terms

a(0) =1a(1) =10a(2) =46a(3) =141a(4) =338a(5) =694a(6) =1273a(7) =2155a(8) =3427a(9) =5194a(10) =7575a(11) =10688a(12) =14672a(13) =19674a(14) =25861a(15) =33406a(16) =42487a(17) =53302a(18) =66061a(19) =80988a(20) =98311a(21) =118271a(22) =141124a(23) =167139a(24) =196597a(25) =229785a(26) =267007a(27) =308575a(28) =354820a(29) =406074