Extensions 1→N→G→Q→1 with N=C₂₁ and Q=C₂xC₄

Direct product G=NxQ with N=C₂₁ and Q=C₂xC₄

		d	ρ	Label	ID
C₂xC₈₄		168		C2xC84	168,39

Semidirect products G=N:Q with N=C₂₁ and Q=C₂xC₄

extension	φ:Q→Aut N	d	ρ	Label	ID
C₂₁:₁(C₂xC₄) = Dic₃xD₇	φ: C₂xC₄/C₂ → C₂² ⊆ Aut C₂₁	84	4-	C21:1(C2xC4)	168,12
C₂₁:₂(C₂xC₄) = S₃xDic₇	φ: C₂xC₄/C₂ → C₂² ⊆ Aut C₂₁	84	4-	C21:2(C2xC4)	168,13
C₂₁:₃(C₂xC₄) = D₂₁:C₄	φ: C₂xC₄/C₂ → C₂² ⊆ Aut C₂₁	84	4+	C21:3(C2xC4)	168,14
C₂₁:₄(C₂xC₄) = C₄xD₂₁	φ: C₂xC₄/C₄ → C₂ ⊆ Aut C₂₁	84	2	C21:4(C2xC4)	168,35
C₂₁:₅(C₂xC₄) = C₁₂xD₇	φ: C₂xC₄/C₄ → C₂ ⊆ Aut C₂₁	84	2	C21:5(C2xC4)	168,25
C₂₁:₆(C₂xC₄) = S₃xC₂₈	φ: C₂xC₄/C₄ → C₂ ⊆ Aut C₂₁	84	2	C21:6(C2xC4)	168,30
C₂₁:₇(C₂xC₄) = C₂xDic₂₁	φ: C₂xC₄/C₂² → C₂ ⊆ Aut C₂₁	168		C21:7(C2xC4)	168,37
C₂₁:₈(C₂xC₄) = C₆xDic₇	φ: C₂xC₄/C₂² → C₂ ⊆ Aut C₂₁	168		C21:8(C2xC4)	168,27
C₂₁:₉(C₂xC₄) = Dic₃xC₁₄	φ: C₂xC₄/C₂² → C₂ ⊆ Aut C₂₁	168		C21:9(C2xC4)	168,32

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