OFFSET
1,2
LINKS
Eric Weisstein's World of Mathematics, Graceful Labeling
Eric Weisstein's World of Mathematics, Simple Graph
CROSSREFS
KEYWORD
nonn,more,hard
AUTHOR
Eric W. Weisstein, Apr 03 2020
EXTENSIONS
a(8) from Eric W. Weisstein, Jul 30 2020
STATUS
approved