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 A081546 #7 Jan 08 2019 09:12:41 %S A081546 2,5,17,97,257,3457,12289,40961,65537,786433,5308417,14155777, %T A081546 104857601,167772161,1811939329,3221225473,24159191041,77309411329, %U A081546 206158430209,2061584302081,2748779069441,6597069766657,39582418599937 %N A081546 Smallest prime which is 1 more than the product of n (not necessarily distinct) composite numbers. %e A081546 a(0) = 1 + 1 = 2, a(3) = 4*4*6 + 1 = 97. %Y A081546 Cf. A081545. %K A081546 hard,nonn %O A081546 0,1 %A A081546 _Amarnath Murthy_, Apr 01 2003 %E A081546 More terms from _Michel ten Voorde_ Jun 13 2003 %E A081546 Added missing term 12289 and a(13)-a(22) from _Donovan Johnson_, Nov 05 2009