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 A323524 #11 Jan 21 2019 05:50:18 %S A323524 1,1,1,1,2,1,2,1,3,2,3,1,5,1,4,4,6,1,10,1,7,10,6,1,24,2,7,22,18,1,38, %T A323524 1,35,43,9,6,124,1,10,77,158,1,110,1,285,186,12,1,742,2,170,203,1110, %U A323524 1,285,480,2115,306,15,1 %N A323524 Number of integer partitions of n whose parts can be arranged into a square matrix with equal row and column sums. %F A323524 a(p) = 1 and a(p^2) = 2 for p prime (see comment in A323349). - _Chai Wah Wu_, Jan 20 2019 %e A323524 The a(12) = 5 integer partitions are (12), (5,5,1,1), (4,4,2,2), (3,3,3,3), (2,2,2,1,1,1,1,1,1). For example, such a matrix for (2,2,2,1,1,1,1,1,1) is: %e A323524 [1 1 2] %e A323524 [2 1 1] %e A323524 [1 2 1] %Y A323524 Cf. A006052, A007016, A103198, A120732, A321719, A321722, A321725, A323306, A323347, A323349, A323523. %K A323524 nonn,more %O A323524 0,5 %A A323524 _Gus Wiseman_, Jan 17 2019 %E A323524 a(16)-a(59) from _Chai Wah Wu_, Jan 20 2019