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 A195421 #10 Mar 31 2012 10:28:38 %S A195421 3,17,3,253124999,4076863487,578415690713087,139967, %T A195421 14097567309074239886172287,73099303486215558911, %U A195421 8954942912818222989311,213770812332484473348458269897727733773465812991,578415690713087,66266428660760838427050496741110705203446361497484562431 %N A195421 Smallest lower twin prime number which sums with its upper twin prime to a perfect n-th power. %F A195421 a(n) = A195336(n)^n/2-1. - R. J. Mathar, Sep 20 2011 %Y A195421 Cf. A001359 %K A195421 nonn %O A195421 1,1 %A A195421 _Kausthub Gudipati_, Sep 18 2011