a(n) = Position of 2^n among the numbers which are divisible by the square of their highest noncomposite factor (i.e., the union of {1} and A070003), 0 if not there.
A244986
a(n) = Position of 2^n among the numbers which are divisible by the square of their highest noncomposite factor (i.e., the union of {1} and A070003), 0 if not there.
Terms
- a(0) =1a(1) =0a(2) =2a(3) =3a(4) =5a(5) =9a(6) =14a(7) =23a(8) =37a(9) =58a(10) =90a(11) =143a(12) =225a(13) =355a(14) =563a(15) =894a(16) =1426a(17) =2277a(18) =3643a(19) =5839a(20) =9398a(21) =15155a(22) =24518a(23) =39758a(24) =64607a(25) =105250a(26) =171874a(27) =281237a(28) =461255a(29) =758040
External references
- oeis: A244986