%I
%S 15,45,99,186,314,503,759,1119,1590,2231,3047,4135,5496,7273,9478,
%T 12300,15771,20169,25528,32230,40370,50440,62595,77528,95454,117305,
%U 143453,175090,212803,258201,312087,376603,452975,543952,651285,778642,928419,1105423
%N Number of pairs (lambda,mu) of partitions lambda of n and mu of seven with mu <= lambda (by diagram containment).
%H Alois P. Heinz, <a href="/A303857/b303857.txt">Table of n, a(n) for n = 7..1000</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/FerrersDiagram.html">Ferrers Diagram</a>
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Ferrers_diagram">Ferrers diagram</a>
%Y Column k=7 of A259478.
%K nonn
%O 7,1
%A _Alois P. Heinz_, May 01 2018
