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C
n
D
n
S
n
A
n
Degree
Linear
Irr Reps
Characters
×
⋊
.
○
≀
Extensions
1→N→G→Q→1 with N=
D
18
and Q=
C
3
2
Direct product G=N×Q with N=
D
18
and Q=
C
3
2
d
ρ
Label
ID
D
9
×C
3
×C
6
108
D9xC3xC6
324,136
Semidirect products G=N:Q with N=
D
18
and Q=
C
3
2
extension
φ:Q→Out N
d
ρ
Label
ID
D
18
⋊C
3
2
=
C
6
×C
9
⋊C
6
φ:
C
3
2
/
C
3
→
C
3
⊆ Out
D
18
36
6
D18:C3^2
324,140
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ℚ
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