This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A118063 #7 Apr 05 2020 17:03:45 %S A118063 16777216,4458050224128,1259085058409489202413568, %T A118063 15738563230118615030169600000000000000000000, %U A118063 46496637333593157266125580467610571799579852800000000000000000000 %N A118063 Denominator of Sum_{i=1..n} 1/(t(i)^t(i)) where t(i) = i-th 3-almost prime. %C A118063 3-almost prime analog of A076265. (Semiprime analog of A076265 is A118056.) Fractions are 1/16777216, 265721/4458050224128, 75047458863267833/1259085058409489202413568, 938093235790847912650094635296999121 / 15738563230118615030169600000000000000000000, 2771420766426289313598405374054613260285749630619149892803 / 46496637333593157266125580467610571799579852800000000000000000000. %F A118063 a(n) = Denominator of Sum_{i=1..n} 1/(3almostprime(i)^3almostprime(i)). %F A118063 a(n) = Denominator of Sum_{i=1..n} 1/(A014612(i)^A014612(i)). %F A118063 a(n) = Denominator of Sum_{i=1..n} 1/A114967(n). %e A118063 a(2) = 4458050224128 because (1/A014612(1)^A014612(1)) + (1/A014612(2)^A014612(2))= (1/(8^8)) + (1/(12^12)) = (1/16777216) + (1/8916100448256) = 265721/4458050224128. %t A118063 Accumulate[1/#^#&/@Select[Range[30],PrimeOmega[#]==3&]]//Denominator (* _Harvey P. Dale_, Apr 05 2020 *) %Y A118063 Numerators = A118062. Cf. A001358, A014612, A051674, A114850, A114967, A117579, A118056. %K A118063 easy,frac,nonn %O A118063 1,1 %A A118063 _Jonathan Vos Post_, Apr 11 2006