G.f. satisfies A(x) = A(x^2)/M(x), where M(x) = Sum_{n>=1} mu(n)*x^n and mu(n) = A008683(n), the Moebius function of n.

A378260

G.f. satisfies A(x) = A(x^2)/M(x), where M(x) = Sum_{n>=1} mu(n)*x^n and mu(n) = A008683(n), the Moebius function of n.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =4a(4) =11a(5) =15a(6) =33a(7) =50a(8) =104a(9) =161a(10) =309a(11) =500a(12) =929a(13) =1529a(14) =2757a(15) =4620a(16) =8207a(17) =13874a(18) =24353a(19) =41478a(20) =72327a(21) =123687a(22) =214685a(23) =368232a(24) =637430a(25) =1095201a(26) =1892492a(27) =3255372a(28) =5619323a(29) =9672701

External references