Extensions 1→N→G→Q→1 with N=D8 and Q=C4

Direct product G=N×Q with N=D8 and Q=C4
dρLabelID
C4×D832C4xD864,118

Semidirect products G=N:Q with N=D8 and Q=C4
extensionφ:Q→Out NdρLabelID
D81C4 = C2.D16φ: C4/C2C2 ⊆ Out D832D8:1C464,38
D82C4 = D82C4φ: C4/C2C2 ⊆ Out D8164D8:2C464,41
D83C4 = D8⋊C4φ: C4/C2C2 ⊆ Out D832D8:3C464,123
D84C4 = C8.26D4φ: C4/C2C2 ⊆ Out D8164D8:4C464,125
D85C4 = C8○D8φ: trivial image162D8:5C464,124

Non-split extensions G=N.Q with N=D8 and Q=C4
extensionφ:Q→Out NdρLabelID
D8.1C4 = D8.C4φ: C4/C2C2 ⊆ Out D8322D8.1C464,40
D8.2C4 = M5(2)⋊C2φ: C4/C2C2 ⊆ Out D8164+D8.2C464,42

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