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 A305784 #5 Jun 10 2018 13:31:51 %S A305784 1,10,75,495,3135,19657,120678,743321,4480240,27176489,161160411, %T A305784 964119615,5635200174,33302382467,192186538999,1123752073702, %U A305784 6413666231367,37159362571856,210072026510678,1207564204033112,6771732706003311,38664907592673960,215359228721631996 %N A305784 Number of set partitions of [n] with alternating parity of elements and exactly ten blocks. %H A305784 Wikipedia, <a href="https://en.wikipedia.org/wiki/Partition_of_a_set">Partition of a set</a> %Y A305784 Column k=10 of A274581. %K A305784 nonn %O A305784 10,2 %A A305784 _Alois P. Heinz_, Jun 10 2018