A032101 Number of dyslexic identity planted planar trees with n+1 nodes.

1, 1, 1, 2, 4, 11, 28, 78, 212, 598, 1686, 4841, 13975, 40777, 119698, 353905, 1051948, 3143582, 9436033, 28443340, 86055366, 261253380, 795587214, 2429692385, 7439569568, 22834518491, 70243063795, 216527666056

Offset

1,4

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=1+BHK(x*p)); Vec(p)} \\ Andrew Howroyd, Aug 30 2018

Crossrefs

Sequence in context: A108629 A007048 A148132 * A005200 A148133 A148134

Adjacent sequences: A032098 A032099 A032100 * A032102 A032103 A032104

Keyword

nonn,eigen

Author

Christian G. Bower

Status

approved