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 A270829 #7 Mar 29 2016 22:38:18 %S A270829 2,0,65573,124,313,484,797,2016,2211,2862,4507,6188,6325,9660,12669, %T A270829 13016,16857,19530,23069,28184,38761,46302,42515,49846,59087,70260, %U A270829 73385,78960,97267,98316,111023,124454,134641,152952,163043,180596,195975,218432 %N A270829 Smallest magic sum for any n X n semimagic square made from consecutive primes, or 0 if no such magic square exists. %C A270829 a(n) <= A073520(n). For n = 3 and 4, a(n) is different from A073520(n). %H A270829 <a href="/index/Mag#magic">Index entries for sequences related to magic squares</a> %F A270829 a(2) = 0, otherwise a(n) = (1/n) * sum(m=k..n^2+k-1, A000040(m)), where k = A049084(A270830(n)). %Y A270829 Cf. A073520, A268912, A270830. %K A270829 nonn %O A270829 1,1 %A A270829 _Arkadiusz Wesolowski_, Mar 23 2016