Extensions 1→N→G→Q→1 with N=C₂ and Q=C₂₁⋊D₄

Direct product G=N×Q with N=C₂ and Q=C₂₁⋊D₄

		d	ρ	Label	ID
C₂×C₂₁⋊D₄		168		C2xC21:D4	336,157

Non-split extensions G=N.Q with N=C₂ and Q=C₂₁⋊D₄

extension	φ:Q→Aut N	d	ρ	Label	ID
C₂.₁(C₂₁⋊D₄) = D₁₄⋊Dic₃	central extension (φ=1)	168		C2.1(C21:D4)	336,42
C₂.₂(C₂₁⋊D₄) = D₆⋊Dic₇	central extension (φ=1)	168		C2.2(C21:D4)	336,43
C₂.₃(C₂₁⋊D₄) = Dic₂₁⋊C₄	central extension (φ=1)	336		C2.3(C21:D4)	336,46
C₂.₄(C₂₁⋊D₄) = C₂₁⋊D₈	central stem extension (φ=1)	168	4	C2.4(C21:D4)	336,29
C₂.₅(C₂₁⋊D₄) = C₂₈.D₆	central stem extension (φ=1)	168	4	C2.5(C21:D4)	336,32
C₂.₆(C₂₁⋊D₄) = C₄₂.D₄	central stem extension (φ=1)	168	4	C2.6(C21:D4)	336,33
C₂.₇(C₂₁⋊D₄) = C₂₁⋊Q₁₆	central stem extension (φ=1)	336	4	C2.7(C21:D4)	336,38

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