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Return the number of subgroups of each non-trivial order in the
abelian p-group G where A = [a_1, a_2, ... ] and
G = C_(a_1) x C_(a_2) x ... . The m-th entry in
the sequence returned is the number of subgroups of order p^m.
Order of automorphism group of abelian p-group G where
A = [a_1, a_2, ... ] and G = C_(a_1) x C_(a_2) x ... .
Subgroups of C_4 x C_8 x C_(64).
> NumberOfSubgroupsAbelianPGroup ([4, 8, 64]);
[ 7, 35, 91, 139, 171, 171, 139, 91, 35, 7, 1 ]
Hence, for example, there are 7 subgroups of order 2 and 139 subgroups
of order 2^4.
> OrderAutomorphismGroupAbelianPGroup ([4, 8, 64]);
4194304
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