15441920domain: NAppears in sequencesExpansion of 1/(1+2*x^2-2*x^3).at n=39A077964Numerators of fractions in the approximation of the square root of 5 satisfying: a(n)= (a(n-1)+ c)/(a(n-1)+1); with c=5 and a(1)=0. Also product of the powers of two and five times the Fibonacci numbers.at n=14A163305