OFFSET
1,8
LINKS
Kevin Lamoreau, Table of n, a(n) for n = 1..2047
EXAMPLE
a(16) = 7 because 1 of the 8 indecomposable groups of order 16 is abelian and 2 of the 9 non-abelian groups of order 16 are decomposable, leaving 7 non-abelian indecomposable groups of order 16.
CROSSREFS
KEYWORD
nonn
AUTHOR
Kevin Lamoreau, Mar 10 2023
STATUS
approved