OFFSET
3,1
LINKS
Christian Sievers, Table of n, a(n) for n = 3..200
Eric Weisstein's World of Mathematics, Gear Graph
Eric Weisstein's World of Mathematics, Irredundant Set
CROSSREFS
KEYWORD
nonn
AUTHOR
Eric W. Weisstein, Aug 07 2017
EXTENSIONS
a(13)-a(16) from Andrew Howroyd, Aug 11 2017
Missing a(12) inserted and a(17)-a(18) added by Andrew Howroyd, Aug 27 2017
More terms from Christian Sievers, Nov 18 2023
STATUS
approved