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 A091358 #3 Mar 30 2012 17:37:13 %S A091358 1,2,5,11,24,46,90,164,298,520,899,1512,2521,4116,6659,10609,16753, %T A091358 26126,40419,61889,94067,141736,212123,315087,465162,682188,994857, %U A091358 1442340,2080332,2984724,4262018,6056849,8569913,12072770,16938556 %N A091358 Number of planar partitions of n with exactly 4 rows. %F A091358 a(n) = A002799(n)-A000991(n). %Y A091358 Column 4 of A091355. Cf. A000219, A091356-A091360. %K A091358 nonn %O A091358 4,2 %A A091358 _Christian G. Bower_, Jan 02 2004