G.f.: Sum_{n>=0} arcsinh(4^n*x)^n/n!, a power series in x having only integer coefficients.
A141367
G.f.: Sum_{n>=0} arcsinh(4^n*x)^n/n!, a power series in x having only integer coefficients.
Terms
- a(0) =1a(1) =4a(2) =128a(3) =43680a(4) =178946048
External references
- oeis: A141367