Extensions 1→N→G→Q→1 with N=C₂×C₁₈ and Q=C₄

Direct product G=N×Q with N=C₂×C₁₈ and Q=C₄

		d	ρ	Label	ID
C₂²×C₃₆		144		C2^2xC36	144,47

Semidirect products G=N:Q with N=C₂×C₁₈ and Q=C₄

extension	φ:Q→Aut N	d	Label	ID
(C₂×C₁₈)⋊₁C₄ = C₉×C₂²⋊C₄	φ: C₄/C₂ → C₂ ⊆ Aut C₂×C₁₈	72	(C2xC18):1C4	144,21
(C₂×C₁₈)⋊₂C₄ = C₁₈.D₄	φ: C₄/C₂ → C₂ ⊆ Aut C₂×C₁₈	72	(C2xC18):2C4	144,19
(C₂×C₁₈)⋊₃C₄ = C₂²×Dic₉	φ: C₄/C₂ → C₂ ⊆ Aut C₂×C₁₈	144	(C2xC18):3C4	144,45

Non-split extensions G=N.Q with N=C₂×C₁₈ and Q=C₄

extension	φ:Q→Aut N	d	ρ	Label	ID
(C₂×C₁₈).₁C₄ = C₉×M₄(2)	φ: C₄/C₂ → C₂ ⊆ Aut C₂×C₁₈	72	2	(C2xC18).1C4	144,24
(C₂×C₁₈).₂C₄ = C₂×C₉⋊C₈	φ: C₄/C₂ → C₂ ⊆ Aut C₂×C₁₈	144		(C2xC18).2C4	144,9
(C₂×C₁₈).₃C₄ = C₄.Dic₉	φ: C₄/C₂ → C₂ ⊆ Aut C₂×C₁₈	72	2	(C2xC18).3C4	144,10

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Extensions 1→N→G→Q→1 with N=C2×C18 and Q=C4