Extensions 1→N→G→Q→1 with N=C21 and Q=C18

Direct product G=NxQ with N=C21 and Q=C18
dρLabelID
C3xC126378C3xC126378,44

Semidirect products G=N:Q with N=C21 and Q=C18
extensionφ:Q→Aut NdρLabelID
C21:1C18 = D21:C9φ: C18/C3C6 ⊆ Aut C211266C21:1C18378,21
C21:2C18 = C3xC7:C18φ: C18/C3C6 ⊆ Aut C21189C21:2C18378,10
C21:3C18 = S3xC7:C9φ: C18/C3C6 ⊆ Aut C211266C21:3C18378,16
C21:4C18 = C6xC7:C9φ: C18/C6C3 ⊆ Aut C21378C21:4C18378,26
C21:5C18 = C9xD21φ: C18/C9C2 ⊆ Aut C211262C21:5C18378,37
C21:6C18 = D7xC3xC9φ: C18/C9C2 ⊆ Aut C21189C21:6C18378,29
C21:7C18 = S3xC63φ: C18/C9C2 ⊆ Aut C211262C21:7C18378,33

Non-split extensions G=N.Q with N=C21 and Q=C18
extensionφ:Q→Aut NdρLabelID
C21.C18 = C7:C54φ: C18/C3C6 ⊆ Aut C211896C21.C18378,1
C21.2C18 = C2xC7:C27φ: C18/C6C3 ⊆ Aut C213783C21.2C18378,2
C21.3C18 = D7xC27φ: C18/C9C2 ⊆ Aut C211892C21.3C18378,4

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