Number of integers q such that phiter(q)=n where phiter(n) = A064415(n).

A064416

Number of integers q such that phiter(q)=n where phiter(n) = A064415(n).

Terms

    a(0) =1a(1) =2a(2) =5a(3) =11a(4) =26a(5) =59a(6) =137a(7) =312a(8) =719a(9) =1651a(10) =3816a(11) =8757a(12) =20202a(13) =46440a(14) =106957a(15) =245989a(16) =566561a(17) =1303968a(18) =3002247a(19) =6910122a(20) =15909143

External references