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 A343124 #7 Apr 05 2021 20:39:41
%S A343124 0,1,11,39,114,273,571,1086,1925,3206,5101,7800,11533,16575,23252,
%T A343124 31911,42987,56943,74304,95662,121682,153060,190614,235200,287758,
%U A343124 349317,421001,503975,599560,709125,834145,976206,1137011,1318314,1522059,1750248,2005011,2288611
%N A343124 Total number of partitions of k*n into 3 parts for k = 1..n.
%H A343124 <a href="/index/Par#part">Index entries for sequences related to partitions</a>
%F A343124 a(n) = Sum_{k=1..n} Sum_{j=1..floor(k*n/3)} Sum_{i=j..floor((k*n-j)/2)} 1.
%t A343124 Table[Sum[Sum[Sum[1, {i, j, Floor[(k*n - j)/2]}], {j, Floor[k*n/3]}], {k, n}], {n, 50}]
%Y A343124 Cf. A069905.
%K A343124 nonn
%O A343124 1,3
%A A343124 _Wesley Ivan Hurt_, Apr 05 2021