Extensions 1→N→G→Q→1 with N=D₁₈ and Q=C₂

Direct product G=N×Q with N=D₁₈ and Q=C₂

		d	ρ	Label	ID
C₂²×D₉		36		C2^2xD9	72,17

Semidirect products G=N:Q with N=D₁₈ and Q=C₂

extension	φ:Q→Out N	d	ρ	Label	ID
D₁₈⋊₁C₂ = D₃₆	φ: C₂/C₁ → C₂ ⊆ Out D₁₈	36	2+	D18:1C2	72,6
D₁₈⋊₂C₂ = C₉⋊D₄	φ: C₂/C₁ → C₂ ⊆ Out D₁₈	36	2	D18:2C2	72,8

Non-split extensions G=N.Q with N=D₁₈ and Q=C₂

extension	φ:Q→Out N	d	ρ	Label	ID
D₁₈.C₂ = C₄×D₉	φ: trivial image	36	2	D18.C2	72,5

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Extensions 1→N→G→Q→1 with N=D18 and Q=C2