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 A271582 #11 Apr 14 2016 10:05:41 %S A271582 11220,15300,17300,17316,19380,20900,26900,27300,28100,29900,31620, %T A271582 33660,34060,34580,35700,39100,39780,42500,42900,43540,43732,43860, %U A271582 44748,45900,46900,47580,47892,47940,49300,50700,51508,52260,53300,53980,54340,55100,55796 %N A271582 Magic sums of 4 X 4 magic squares composed of odd squares. %C A271582 Every number of the form 8*x + 4, where x is a term of A271579, is in the sequence. %H A271582 <a href="/index/Mag#magic">Index entries for sequences related to magic squares</a> %e A271582 Examples of 4 X 4 magic squares composed of odd squares. %e A271582 . %e A271582 |-----|-----|-----|-----| %e A271582 | 23^2| 3^2 | 49^2| 91^2| %e A271582 |-----|-----|-----|-----| %e A271582 | 61^2| 71^2| 37^2| 33^2| %e A271582 |-----|-----|-----|-----| %e A271582 | 79^2| 29^2| 63^2| 13^2| %e A271582 |-----|-----|-----|-----| %e A271582 | 27^2| 73^2| 59^2| 41^2| %e A271582 |-----|-----|-----|-----| %e A271582 The magic constant is 11220 = a(1). %e A271582 . %e A271582 |-----|-----|-----|-----| %e A271582 | 3^2 | 19^2| 59^2|107^2| %e A271582 |-----|-----|-----|-----| %e A271582 | 49^2|103^2| 47^2| 9^2 | %e A271582 |-----|-----|-----|-----| %e A271582 |113^2| 39^2| 31^2| 7^2 | %e A271582 |-----|-----|-----|-----| %e A271582 | 11^2| 53^2| 93^2| 61^2| %e A271582 |-----|-----|-----|-----| %e A271582 The magic constant is 15300 = a(2). %Y A271582 Cf. A016754, A271579. Subsequence of A271580. Supersequence of A271583. %K A271582 nonn %O A271582 1,1 %A A271582 _Arkadiusz Wesolowski_, Apr 10 2016