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 A303851 #14 Feb 16 2025 08:33:54 %S A303851 1,1,2,3,8,12,23,35,70,105,178,262,479,690,1119,1590,2687,3756,5960, %T A303851 8221,13203,17994,27728,37363,58293,77767,117084,154747,234579,307400, %U A303851 455637,592377,878603,1134126,1652382,2118344,3089769,3936532,5654741,7161970 %N A303851 Number of pairs (lambda,mu) of partitions lambda of n and mu of floor(n/2) with mu <= lambda (by diagram containment). %H A303851 Alois P. Heinz, <a href="/A303851/b303851.txt">Table of n, a(n) for n = 0..200</a> %H A303851 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/FerrersDiagram.html">Ferrers Diagram</a> %H A303851 Wikipedia, <a href="https://en.wikipedia.org/wiki/Ferrers_diagram">Ferrers diagram</a> %F A303851 a(n) = A259478(n,floor(n/2)). %Y A303851 Bisections give: A303861 (even part), A303862 (odd part). %Y A303851 Cf. A259478. %K A303851 nonn %O A303851 0,3 %A A303851 _Alois P. Heinz_, May 01 2018