a(n) = coefficient of x^n in the (n+1)-th iteration of Sum_{k>=0} x^(2^k), n>=1.
A168366
a(n) = coefficient of x^n in the (n+1)-th iteration of Sum_{k>=0} x^(2^k), n>=1.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =75a(4) =650a(5) =7238a(6) =98728a(7) =1597689a(8) =29965770a(9) =639867250a(10) =15337926824a(11) =408041226684
External references
- oeis: A168366