cp's OEIS Frontend

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.

A227809 Number of rooted identity trees with n nodes and exactly 5 subtrees from the root.

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%I A227809 #5 Jul 31 2013 17:08:08
%S A227809 1,6,18,57,165,460,1242,3295,8589,22169,56675,143941,363527,914253,
%T A227809 2291088,5725579,14275461,35526939,88279211,219088566,543169235,
%U A227809 1345516437,3330785029,8240718421,20379364252,50380569630,124513186628,307663311638,760095010218
%N A227809 Number of rooted identity trees with n nodes and exactly 5 subtrees from the root.
%H A227809 Alois P. Heinz, <a href="/A227809/b227809.txt">Table of n, a(n) for n = 15..800</a>
%e A227809 : n=15     o        :
%e A227809 :       / /|\ \     :
%e A227809 :      / ( | ) \    :
%e A227809 :     o  o o o  o   :
%e A227809 :    /|  | | |      :
%e A227809 :   o o  o o o      :
%e A227809 :   |    | |        :
%e A227809 :   o    o o        :
%e A227809 :        |          :
%e A227809 :        o          :
%Y A227809 Column k=5 of A227774.
%K A227809 nonn
%O A227809 15,2
%A A227809 _Alois P. Heinz_, Jul 31 2013