A Combinatorial Interpretation for Sequence A345973 in OEIS
Combinatorics
2021-08-12 v1
Abstract
We give a combinatorial interpretation in terms of bicolored ordered trees for the sequence (a_n)_{n>=1}=(1, 1, 1, 2, 3, 6, 10, 20, 36, 73,... ), A345973 in OEIS, whose generating function satisfies the defining identity Sum_{n>=1}a_n x^n = x + x^2/Product_{n>=1}(1 - a_n x^n).
Cite
@article{arxiv.2108.04969,
title = {A Combinatorial Interpretation for Sequence A345973 in OEIS},
author = {David Callan},
journal= {arXiv preprint arXiv:2108.04969},
year = {2021}
}
Comments
3 pages, 1 figure