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 A305782 #5 Jun 10 2018 13:31:12 %S A305782 1,8,48,254,1284,6456,31559,155828,747046,3633393,17131855,82235382, %T A305782 382314833,1814891650,8339187411,39220306016,178502457056, %U A305782 832998001071,3762499165935,17443657250690,78322897989851,361141330169264,1614162421290491,7409032399939348 %N A305782 Number of set partitions of [n] with alternating parity of elements and exactly eight blocks. %H A305782 Wikipedia, <a href="https://en.wikipedia.org/wiki/Partition_of_a_set">Partition of a set</a> %Y A305782 Column k=8 of A274581. %K A305782 nonn %O A305782 8,2 %A A305782 _Alois P. Heinz_, Jun 10 2018