Extensions 1→N→G→Q→1 with N=Q8 and Q=D21

Direct product G=N×Q with N=Q8 and Q=D21
dρLabelID
Q8×D211684-Q8xD21336,200

Semidirect products G=N:Q with N=Q8 and Q=D21
extensionφ:Q→Out NdρLabelID
Q8⋊D21 = Q8⋊D21φ: D21/C7S3 ⊆ Out Q8564+Q8:D21336,119
Q82D21 = Q82D21φ: D21/C21C2 ⊆ Out Q81684+Q8:2D21336,103
Q83D21 = Q83D21φ: trivial image1684+Q8:3D21336,201

Non-split extensions G=N.Q with N=Q8 and Q=D21
extensionφ:Q→Out NdρLabelID
Q8.D21 = Q8.D21φ: D21/C7S3 ⊆ Out Q81124-Q8.D21336,118
Q8.2D21 = C217Q16φ: D21/C21C2 ⊆ Out Q83364-Q8.2D21336,104

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