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 A006687 M5418 #16 Jul 08 2025 16:52:52 %S A006687 241,5521,6481,51361,346561,380881,390001,1678321,4332721,4654801, %T A006687 5576881,12707521,39336721,41432641,42942001,99990001,167948881, %U A006687 184970641,197063761,205598881 %N A006687 Duodecimal primes: p = (x^12 + y^12 )/(x^4 + y^4 ). %D A006687 A. J. C. Cunningham, Binomial Factorisations, Vols. 1-9, Hodgson, London, 1923-1929; see Vol. 1, pp. 245-259. %D A006687 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A006687 A. J. C. Cunningham, <a href="/A001912/a001912.pdf">Binomial Factorisations</a>, Vols. 1-9, Hodgson, London, 1923-1929. [Annotated scans of a few pages from Volumes 1 and 2] %K A006687 nonn %O A006687 1,1 %A A006687 _N. J. A. Sloane_