E.g.f.: Sum_{n>=0} 2^(-n*(n+1)/2!) * Product_{k=0..n} tanh(2^k*x).
A194457
E.g.f.: Sum_{n>=0} 2^(-n*(n+1)/2!) * Product_{k=0..n} tanh(2^k*x).
Terms
- a(0) =1a(1) =2a(2) =4a(3) =-16a(4) =-704a(5) =-17728a(6) =-337616a(7) =11402624a(8) =3549329536a(9) =595083636992
External references
- oeis: A194457