The function A(x) = x+(1/2)*x^2-(1/16)*x^4... = Sum_{k >= 0} x^k*a(k)/A381670(k) satisfies the functional equation: x*(A(x)+1) = A(A(x)).
A381669
The function A(x) = x+(1/2)*x^2-(1/16)*x^4... = Sum_{k >= 0} x^k*a(k)/A381670(k) satisfies the functional equation: x*(A(x)+1) = A(A(x)).
Terms
- a(0) =0a(1) =1a(2) =1a(3) =0a(4) =-1a(5) =1a(6) =-1a(7) =-1a(8) =113a(9) =-19a(10) =-1049a(11) =849a(12) =10171a(13) =-67975a(14) =183735a(15) =143679a(16) =-81627111a(17) =-135422127a(18) =3045667427a(19) =341639611a(20) =-225862086367a(21) =212228801943
External references
- oeis: A381669