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 A058805 #3 Mar 30 2012 17:37:12 %S A058805 1,1,1,0,1,7,97,1981,56611,2151857,104905809,6375234313,472007532691, %T A058805 41778412444165,4351370158008721,526176012328671173, %U A058805 73022861716667028531,11515387009980686269561 %N A058805 Number of labeled vertically indecomposable lattices with a fixed top and bottom. %Y A058805 a(n)=A058803(n)/(n*(n-1))=A058804(n)/(n-1). %K A058805 nonn,hard %O A058805 0,6 %A A058805 _Christian G. Bower_, Dec 28 2000