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

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

		d	ρ	Label	ID
C₂×C₃₆		72		C2xC36	72,9

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

extension	φ:Q→Aut N	d	ρ	Label	ID
C₁₈⋊C₄ = C₂×Dic₉	φ: C₄/C₂ → C₂ ⊆ Aut C₁₈	72		C18:C4	72,7

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

extension	φ:Q→Aut N	d	ρ	Label	ID
C₁₈.C₄ = C₉⋊C₈	φ: C₄/C₂ → C₂ ⊆ Aut C₁₈	72	2	C18.C4	72,1

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