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 A091357 #10 Sep 24 2018 20:05:50 %S A091357 1,2,5,11,22,42,78,138,239,405,669,1088,1741,2744,4267,6564,9975, %T A091357 15019,22394,33111,48549,70678,102127,146636,209186,296697,418401, %U A091357 586985,819218,1137962,1573336,2165888,2968914,4053563,5512820,7469989 %N A091357 Number of planar partitions of n with exactly 3 rows. %F A091357 a(n) = A000991(n)-A000990(n). %Y A091357 Column 3 of A091355. %Y A091357 Cf. A000219, A089924, A091356-A091360. %K A091357 nonn %O A091357 3,2 %A A091357 _Christian G. Bower_, Jan 02 2004