OFFSET
0,1
LINKS
Eric Weisstein's World of Mathematics, Irredundant Set
Eric Weisstein's World of Mathematics, Triangular Grid Graph
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, Sep 11 2021
EXTENSIONS
Missing a(0) inserted and a(7)-a(10) from Andrew Howroyd, Jan 19 2022
STATUS
approved