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 A070737 #7 Oct 19 2017 03:14:01 %S A070737 3,4,6,6,1068630,6770610,2981997480,339126523890,120351747887280, %T A070737 13533264289711320 %N A070737 Smallest number x such that the first n cyclotomic polynomials evaluated at x are primes. %C A070737 Let Phi_k be the k-th cyclotomic polynomial. a(n) is the least integer x such that for each k from 1 to n, Phi_k(x) is prime. %e A070737 a(6)=x=6770610 because Phi_1(x)=x-1, Phi_2(x)=x+1, Phi_3(x)=x^2+x+1, Phi_4(x)=x^2+1, Phi_5(x)=x^4+x^3+x^2+x+1 and Phi_6(x)=x^2-x+1 are all prime. %Y A070737 Cf. A014574, A070020, A070025, A070043. %K A070737 nonn %O A070737 1,1 %A A070737 _Don Reble_, May 15 2002 and _Phil Carmody_, Aug 09 2002