Extensions 1→N→G→Q→1 with N=C₂₁ and Q=C₄²

Direct product G=N×Q with N=C₂₁ and Q=C₄²

		d	ρ	Label	ID
C₄×C₈₄		336		C4xC84	336,106

Semidirect products G=N:Q with N=C₂₁ and Q=C₄²

extension	φ:Q→Aut N	d	ρ	Label	ID
C₂₁⋊C₄² = Dic₃×Dic₇	φ: C₄²/C₂² → C₂² ⊆ Aut C₂₁	336		C21:C4^2	336,41
C₂₁⋊₂C₄² = C₄×Dic₂₁	φ: C₄²/C₂×C₄ → C₂ ⊆ Aut C₂₁	336		C21:2C4^2	336,97
C₂₁⋊₃C₄² = C₁₂×Dic₇	φ: C₄²/C₂×C₄ → C₂ ⊆ Aut C₂₁	336		C21:3C4^2	336,65
C₂₁⋊₄C₄² = Dic₃×C₂₈	φ: C₄²/C₂×C₄ → C₂ ⊆ Aut C₂₁	336		C21:4C4^2	336,81

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