OFFSET
1,1
LINKS
Christian Sievers, Table of n, a(n) for n = 1..8
Eric Weisstein's World of Mathematics, Irredundant Set
Eric Weisstein's World of Mathematics, Sierpinski Sieve Graph
CROSSREFS
KEYWORD
nonn
AUTHOR
_Eric W. Weisstein_, Sep 11 2021
EXTENSIONS
a(4) and beyond from _Christian Sievers_, Jul 23 2024
STATUS
approved