# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a103980 Showing 1-1 of 1 %I A103980 #8 Nov 02 2019 13:26:07 %S A103980 1,1,3,45,35,4725,31185,945945,289575,310134825,3273645375, %T A103980 50414138775,5749711695,102776096548125,1494206326738125, %U A103980 92854250304440625,191898783962510625,107655217802968460625 %N A103980 Reduced denominators of x^(2n) in the series expansion of erf(x)^2 Pi/4 about 0. %H A103980 Eric Weisstein's World of Mathematics, Erf %e A103980 x^2 - (2*x^4)/3 + (14*x^6)/45 - (4*x^8)/35 + (166*x^10)/4725 + ... %Y A103980 Cf. A103979. %K A103980 nonn,frac %O A103980 0,3 %A A103980 _Eric W. Weisstein_, Feb 23 2005 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE