Voozh

VOOZH

URL: https://oeis.org/A336545

⇱ A336545 - OEIS

login

A336545

Sum over all unlabeled connected graphs of order n, of the number of connected graphs obtainable by deletion of a single vertex in the graph.

2

1, 1, 2, 8, 44, 333, 3771, 67099, 2026711, 108874798, 10682063400

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

OFFSET

1,3

LINKS

Table of n, a(n) for n=1..11.

Sean A. Irvine, Illustration of initial terms

Sean A. Irvine, Java program (github)

CROSSREFS

Sequence in context: A372156 A330444 A253949 * A126101 A308478 A157994

Adjacent sequences: A336542 A336543 A336544 * A336546 A336547 A336548

KEYWORD

nonn,more

AUTHOR

Sean A. Irvine, Jul 25 2020

STATUS

approved