Extensions 1→N→G→Q→1 with N=C₂ and Q=D₁₂₁

Direct product G=N×Q with N=C₂ and Q=D₁₂₁

		d	ρ	Label	ID
D₂₄₂		242	2+	D242	484,3

Non-split extensions G=N.Q with N=C₂ and Q=D₁₂₁

extension	φ:Q→Aut N	d	ρ	Label	ID
C₂.D₁₂₁ = Dic₁₂₁	central extension (φ=1)	484	2-	C2.D121	484,1

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Extensions 1→N→G→Q→1 with N=C2 and Q=D121