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 A265614 #4 Dec 13 2015 07:45:05 %S A265614 21821,21839,21841,21851,21859,21863,21871,21881,21893 %N A265614 A set of nine consecutive primes forming a 3 X 3 semimagic square with the smallest magic constant (65573). %H A265614 <a href="/index/Mag#magic">Index entries for sequences related to magic squares</a> %e A265614 The semimagic square is %e A265614 |-----|-----|-----| %e A265614 |21821|21859|21893| %e A265614 |-----|-----|-----| %e A265614 |21871|21863|21839| %e A265614 |-----|-----|-----| %e A265614 |21881|21851|21841| %e A265614 |-----|-----|-----| %t A265614 Prime@Range[2448, 2456] %Y A265614 Cf. A073519, A265139. %K A265614 nonn,fini,full %O A265614 1,1 %A A265614 _Arkadiusz Wesolowski_, Dec 10 2015