1. The problem statement, all variables and given/known data Self-given problem; I want to prove that Gamma (1/4) is approxiamately equal to 3.625, but can't seem to integrate it properly... Gamma(z) = (integral between infinity and 0) (t^z-1)(e^-t) dt (http://www.wikipedia.org/wiki/Gamma_function) 2. Relevant equations Gamma(n+1) = n Gamma (n) 3. The attempt at a solution Tried an integration by substitution and an integration by parts, and no luck! Thanks for your help!