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 A303863 #10 Feb 16 2025 08:33:54 %S A303863 1,4,13,42,114,313,759,1858,4207,9468,20198,42955,87333,176706,346450, %T A303863 673619,1276936,2404288,4429895,8105634,14576610,26017631,45767924, %U A303863 79970030,137934105,236375455,400667547,674818625,1125626097,1866565406,3068368925,5015847315 %N A303863 Number of pairs (lambda,mu) of partitions lambda of 2n+1 and mu of n+1 with mu <= lambda (by diagram containment). %H A303863 Alois P. Heinz, <a href="/A303863/b303863.txt">Table of n, a(n) for n = 0..100</a> %H A303863 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/FerrersDiagram.html">Ferrers Diagram</a> %H A303863 Wikipedia, <a href="https://en.wikipedia.org/wiki/Ferrers_diagram">Ferrers diagram</a> %F A303863 a(n) = A259478(2n+1,n+1) = A303852(2n+1). %Y A303863 Bisection (odd part) of A303852. %Y A303863 Cf. A259478. %K A303863 nonn %O A303863 0,2 %A A303863 _Alois P. Heinz_, May 01 2018