OFFSET

1,2

COMMENTS

This sequence is a permutation of the natural numbers, with inverse A347540.

LINKS

Kevin Ryde, Table of n, a(n) for n = 1..7813 (trees <= 12 vertices)

EXAMPLE

For n=33, row 33 of A346913 is levels sequence 1,2,3,3,2,3 which is the following tree,

root 21 a(33) = 21 Matula-Goebel number

| \ (being prime(4)*prime(2) = 21)

children 4 2

|\ |

1 1 1

CROSSREFS

KEYWORD

nonn

AUTHOR

Kevin Ryde, Sep 06 2021

STATUS

approved