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 A081947 #6 Dec 05 2013 19:56:03 %S A081947 2,3,7,31,181,1009,6481,45361,453601,3991681,39916801,566092801, %T A081947 9500198401,114960384001,1976041267201,24845812992001,502146957312001, %U A081947 8109673360588801,147254595231744001,2688996956405760001 %N A081947 Smallest prime which is one more than the product of n distinct numbers. %e A081947 a(5) = 181 = 1*2*3*5*6 + 1. %Y A081947 Cf. A046972. %K A081947 nonn %O A081947 1,1 %A A081947 _Amarnath Murthy_, Apr 02 2003 %E A081947 More terms from _Sam Alexander_, Oct 20 2003 %E A081947 Corrected and extended by _David Wasserman_, Jul 20 2004