Extensions 1→N→G→Q→1 with N=C₁₈ and Q=C₃xC₉

Direct product G=NxQ with N=C₁₈ and Q=C₃xC₉

		d	ρ	Label	ID
C₃xC₉xC₁₈		486		C3xC9xC18	486,190

Semidirect products G=N:Q with N=C₁₈ and Q=C₃xC₉

extension	φ:Q→Aut N	d	ρ	Label	ID
C₁₈:₁(C₃xC₉) = C₁₈x3_-¹⁺²	φ: C₃xC₉/C₉ → C₃ ⊆ Aut C₁₈	162		C18:1(C3xC9)	486,195
C₁₈:₂(C₃xC₉) = C₆xC₉:C₉	φ: C₃xC₉/C₃² → C₃ ⊆ Aut C₁₈	486		C18:2(C3xC9)	486,192

Non-split extensions G=N.Q with N=C₁₈ and Q=C₃xC₉

extension	φ:Q→Aut N	d	ρ	Label	ID
C₁₈.₁(C₃xC₉) = C₂xC₂₇oHe₃	φ: C₃xC₉/C₉ → C₃ ⊆ Aut C₁₈	162	3	C18.1(C3xC9)	486,209
C₁₈.₂(C₃xC₉) = C₂xC₂₇:C₉	φ: C₃xC₉/C₃² → C₃ ⊆ Aut C₁₈	54	9	C18.2(C3xC9)	486,82
C₁₈.₃(C₃xC₉) = C₂xC₉²:₃C₃	φ: C₃xC₉/C₃² → C₃ ⊆ Aut C₁₈	162		C18.3(C3xC9)	486,193
C₁₈.₄(C₃xC₉) = C₆xC₂₇:C₃	φ: C₃xC₉/C₃² → C₃ ⊆ Aut C₁₈	162		C18.4(C3xC9)	486,208
C₁₈.₅(C₃xC₉) = C₂xC₂₇:₂C₉	central extension (φ=1)	486		C18.5(C3xC9)	486,71
C₁₈.₆(C₃xC₉) = C₂xC₈₁:C₃	central extension (φ=1)	162	3	C18.6(C3xC9)	486,84

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