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 A048141 #21 May 23 2025 15:12:46
%S A048141 1,0,0,1,0,0,2,1,0,2,1,0,2,1,0,3,2,0,4,4,0,4,5,0,5,7,1,6,9,1,6,11,1,8,
%T A048141 15,2,10,20,3,10,25,4,12,33,7,14,40,9,15,48,12,18,60,17,20,74,23,22,
%U A048141 89,30,26,108,40,30,130,51,33,157,66,37,187,85,42,222,108,47,262,136,54
%N A048141 Number of symmetrical planar partitions of n: planar partitions (A000219) that when regarded as 3-D objects have a threefold axis of symmetry that is the intersection of 3 mirror planes, i.e., C3v symmetry.
%H A048141 Wouter Meeussen, <a href="/A048141/b048141.txt">Table of n, a(n) for n = 1..202</a>
%e A048141 The plane partition {{2,1},{1}} has C3v symmetry.
%Y A048141 Cf. A000219, A000784, A000785, A000786, A005987, A048142, A051056-A051061, A096419.
%K A048141 nice,nonn
%O A048141 1,7
%A A048141 _Wouter Meeussen_