A032103 - OEIS

A032103

Number of dyslexic identity planted planar trees with n+1 nodes and leaves of 2 colors.

2, 2, 3, 9, 32, 125, 489, 1971, 8057, 33582, 141854, 606967, 2623678, 11444588, 50306835, 222638649, 991173730, 4435974275, 19946529375, 90069370028, 408261634445, 1856940442884, 8472695323318

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Andrew Howroyd, Table of n, a(n) for n = 1..200

C. G. Bower, Transforms (2)

Index entries for sequences related to rooted trees

FORMULA

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

PROG

(PARI)

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

seq(n)={my(p=O(1)); for(i=1, n, p=2+BHK(x*p)); Vec(p)} \\ Andrew Howroyd, Aug 30 2018

CROSSREFS

Sequence in context: A021821 A019234 A032172 * A091044 A079661 A220644

Adjacent sequences: A032100 A032101 A032102 * A032104 A032105 A032106

KEYWORD

nonn

AUTHOR

Christian G. Bower

STATUS

approved