Extensions 1→N→G→Q→1 with N=C₂² and Q=D₂₁

Direct product G=N×Q with N=C₂² and Q=D₂₁

		d	ρ	Label	ID
C₂²×D₂₁		84		C2^2xD21	168,56

Semidirect products G=N:Q with N=C₂² and Q=D₂₁

extension	φ:Q→Aut N	d	ρ	Label	ID
C₂²⋊D₂₁ = C₇⋊S₄	φ: D₂₁/C₇ → S₃ ⊆ Aut C₂²	28	6+	C2^2:D21	168,46
C₂²⋊₂D₂₁ = C₂₁⋊₇D₄	φ: D₂₁/C₂₁ → C₂ ⊆ Aut C₂²	84	2	C2^2:2D21	168,38

Non-split extensions G=N.Q with N=C₂² and Q=D₂₁

extension	φ:Q→Aut N	d	ρ	Label	ID
C₂².D₂₁ = C₂×Dic₂₁	central extension (φ=1)	168		C2^2.D21	168,37

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Extensions 1→N→G→Q→1 with N=C22 and Q=D21