G.f. A(x) satisfies A(A(x)) = B(x) such that the coefficients of B(x) consist of all 1's and 2's, with A(0) = 0.
A112105
G.f. A(x) satisfies A(A(x)) = B(x) such that the coefficients of B(x) consist of all 1's and 2's, with A(0) = 0.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =0a(4) =1a(5) =-3a(6) =7a(7) =-10a(8) =-5a(9) =84a(10) =-248a(11) =90a(12) =2160a(13) =-7541a(14) =-5846a(15) =122824a(16) =-186259a(17) =-2036532a(18) =8665409a(19) =36714511a(20) =-345711246a(21) =-517802065a(22) =14415153844a(23) =-9423161197a(24) =-653074772917
External references
- oeis: A112105