OFFSET
1,2
LINKS
Pontus von Brömssen, Table of n, a(n) for n = 1..10000
Eric Weisstein's World of Mathematics, Haar Graph
EXAMPLE
Haar(5) and Haar(6) are both isomorphic to the 6-cycle graph, so 5 appears in the sequence but 6 does not.
CROSSREFS
KEYWORD
nonn
AUTHOR
Eric W. Weisstein, Feb 07 2008
EXTENSIONS
Name clarified by Eric W. Weisstein, Aug 19 2017
STATUS
approved