Moebius transform of A003961; a(n) = phi(A003961(n)), where A003961 shifts the prime factorization of n one step towards the larger primes.

A003972

Moebius transform of A003961; a(n) = phi(A003961(n)), where A003961 shifts the prime factorization of n one step towards the larger primes.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =6a(4) =6a(5) =8a(6) =10a(7) =18a(8) =20a(9) =12a(10) =12a(11) =24a(12) =16a(13) =20a(14) =24a(15) =54a(16) =18a(17) =40a(18) =22a(19) =36a(20) =40a(21) =24a(22) =28a(23) =72a(24) =42a(25) =32a(26) =100a(27) =60a(28) =30a(29) =48

External references