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 A028372 #14 Jul 04 2018 15:49:25 %S A028372 2,2,73,73,241,241,1009,1009,1009,1009,7561,7561,21961,35281,35281, %T A028372 35281,44641,44641,374089,622561,622561,622561,4379281,4379281, %U A028372 4379281,17690689,17690689,17690689,17690689,17690689,316234801,1996405009,1996405009,1996405009 %N A028372 Smallest prime that is simultaneously of forms x^2 + m*y^2 for m = 1, ..., n. %C A028372 Sequence A155715 lists the smallest numbers of this kind with x,y > 0, but not necessarily prime. - _M. F. Hasler_, Jan 27 2009 %C A028372 a(n) > 4*10^9 for n >= 35. - _Donovan Johnson_, May 29 2012 %o A028372 (PARI) p=2; for(k=1,999, forstep( c=k,1,-1, for( b=1,sqrtint(p\c), issquare(p-c*b^2) & next(2)); p=nextprime(p+1); c=k+1); print1(p",")) \\ _M. F. Hasler_, Jan 27 2009 %K A028372 nonn %O A028372 1,1 %A A028372 _John L. Drost_ %E A028372 a(17)-a(18) corrected and a(26)-a(31) from _Donovan Johnson_, Sep 29 2009 %E A028372 a(32)-a(34) from _Donovan Johnson_, May 29 2012