login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A032101 Number of dyslexic identity planted planar trees with n+1 nodes. 2

%I #11 Aug 30 2018 15:00:01

%S 1,1,1,2,4,11,28,78,212,598,1686,4841,13975,40777,119698,353905,

%T 1051948,3143582,9436033,28443340,86055366,261253380,795587214,

%U 2429692385,7439569568,22834518491,70243063795,216527666056

%N Number of dyslexic identity planted planar trees with n+1 nodes.

%H Andrew Howroyd, <a href="/A032101/b032101.txt">Table of n, a(n) for n = 1..200</a>

%H C. G. Bower, <a href="/transforms2.html">Transforms (2)</a>

%H <a href="/index/Ro#rooted">Index entries for sequences related to rooted trees</a>

%F Shifts left under "BHK" (reversible, identity, unlabeled) transform

%o (PARI)

%o BHK(p)={p + (1/(1-p) - (1+p)/subst(1-p, x, x^2))/2}

%o seq(n)={my(p=O(1));for(i=1, n, p=1+BHK(x*p)); Vec(p)} \\ _Andrew Howroyd_, Aug 30 2018

%K nonn,eigen

%O 1,4

%A _Christian G. Bower_

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 24 11:21 EDT 2024. Contains 371936 sequences. (Running on oeis4.)