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 A303862 #13 Feb 16 2025 08:33:54 %S A303862 1,3,12,35,105,262,690,1590,3756,8221,17994,37363,77767,154747,307400, %T A303862 592377,1134126,2118344,3936532,7161970,12955028,23043927,40717240, %U A303862 70937194,122845251,210072976,357119309,600696846,1004415874,1663790776,2740918749,4477271509 %N A303862 Number of pairs (lambda,mu) of partitions lambda of 2n+1 and mu of n with mu <= lambda (by diagram containment). %H A303862 Alois P. Heinz, <a href="/A303862/b303862.txt">Table of n, a(n) for n = 0..100</a> %H A303862 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/FerrersDiagram.html">Ferrers Diagram</a> %H A303862 Wikipedia, <a href="https://en.wikipedia.org/wiki/Ferrers_diagram">Ferrers diagram</a> %F A303862 a(n) = A259478(2n+1,n) = A303851(2n+1). %Y A303862 Bisection (odd part) of A303851. %Y A303862 Cf. A259478. %K A303862 nonn %O A303862 0,2 %A A303862 _Alois P. Heinz_, May 01 2018