G.f.: A(x) = 1 + x*(A_2)^3; A_2 = 1 + x^2*(A_3)^3; A_3 = 1 + x^3*(A_4)^3; ... A_n = 1 + x^n*(A_{n+1})^3 for n>=1 with A_1 = A(x).
A132330
G.f.: A(x) = 1 + x*(A_2)^3; A_2 = 1 + x^2*(A_3)^3; A_3 = 1 + x^3*(A_4)^3; ... A_n = 1 + x^n*(A_{n+1})^3 for n>=1 with A_1 = A(x).
Terms
- a(0) =1a(1) =1a(2) =0a(3) =3a(4) =0a(5) =3a(6) =9a(7) =1a(8) =18a(9) =9a(10) =36a(11) =45a(12) =57a(13) =90a(14) =114a(15) =351a(16) =165a(17) =558a(18) =738a(19) =1044a(20) =1791a(21) =1908a(22) =3915a(23) =4926a(24) =8568a(25) =8553a(26) =17217a(27) =26271a(28) =30474a(29) =50967
External references
- oeis: A132330