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 A128456 #4 Mar 31 2012 13:20:36 %S A128456 2,7,311,127,23,157,7563707819165039903,75368484119,47,9629,311,25679, %T A128456 821,758771382833029,12409,71233,18438666190697,2443783,2939291,71711, %U A128456 352883,181113265579,167,105199,3881,1314520253,619,20759,117503,1162660843 %N A128456 Quotients A128452(p+1)/p for prime p = A000040(n). %C A128456 a(n) coincides with A128357(n) from n = 2 up to n = 6. %F A128456 a(n) = A128452(A000040(n)+1)/A000040(n). %F A128456 a(n) = A020639(((p+1)^p - 1)/p^2), i.e., the smallest prime factor of ((p+1)^p - 1)/p^2, where p = A000040(n). %Y A128456 Cf. A128452, A128357, A128356, A127103, A127104, A127105, A127106, A127107, A127102, A127101, A127100, A127092, A128393, A128394, A128395, A128396, A128397, A128398, A128399, A128400, A128401, A128402, A128403, A128404. %K A128456 nonn %O A128456 1,1 %A A128456 _Alexander Adamchuk_, Mar 05 2007, Mar 09 2007 %E A128456 Terms a(14) onward from _Max Alekseyev_, May 05 2010