OFFSET
1,2
COMMENTS
By Lagrange's theorem, a(n) is always a multiple of n, and it is likely this multiple is always 2, 3, or 4 for n>1.
Because of dihedral groups, a(2k+1) = 4k+2.
LINKS
Bob Heffernan, Table of n, a(n) for n = 1..191
EXAMPLE
a(4) = 12 because the smallest finite group with a conjugacy class of size 4 has order 12 (A_4).
CROSSREFS
KEYWORD
nonn
AUTHOR
Bob Heffernan and Des MacHale, Feb 02 2021
STATUS
approved