Extensions 1→N→G→Q→1 with N=D4 and Q=D18

Direct product G=NxQ with N=D4 and Q=D18
dρLabelID
C2xD4xD972C2xD4xD9288,356

Semidirect products G=N:Q with N=D4 and Q=D18
extensionφ:Q→Out NdρLabelID
D4:1D18 = D8xD9φ: D18/D9C2 ⊆ Out D4724+D4:1D18288,120
D4:2D18 = D8:D9φ: D18/D9C2 ⊆ Out D4724D4:2D18288,121
D4:3D18 = C2xD4:D9φ: D18/C18C2 ⊆ Out D4144D4:3D18288,142
D4:4D18 = D4:D18φ: D18/C18C2 ⊆ Out D4724+D4:4D18288,160
D4:5D18 = C2xD4:2D9φ: trivial image144D4:5D18288,357
D4:6D18 = D4:6D18φ: trivial image724D4:6D18288,358
D4:7D18 = C4oD4xD9φ: trivial image724D4:7D18288,362
D4:8D18 = D4:8D18φ: trivial image724+D4:8D18288,363

Non-split extensions G=N.Q with N=D4 and Q=D18
extensionφ:Q→Out NdρLabelID
D4.1D18 = D8:3D9φ: D18/D9C2 ⊆ Out D41444-D4.1D18288,122
D4.2D18 = SD16xD9φ: D18/D9C2 ⊆ Out D4724D4.2D18288,123
D4.3D18 = D72:C2φ: D18/D9C2 ⊆ Out D4724+D4.3D18288,124
D4.4D18 = SD16:D9φ: D18/D9C2 ⊆ Out D41444-D4.4D18288,125
D4.5D18 = SD16:3D9φ: D18/D9C2 ⊆ Out D41444D4.5D18288,126
D4.6D18 = C2xD4.D9φ: D18/C18C2 ⊆ Out D4144D4.6D18288,141
D4.7D18 = D36:6C22φ: D18/C18C2 ⊆ Out D4724D4.7D18288,143
D4.8D18 = D4.D18φ: D18/C18C2 ⊆ Out D41444-D4.8D18288,159
D4.9D18 = D4.9D18φ: D18/C18C2 ⊆ Out D41444D4.9D18288,161
D4.10D18 = D4.10D18φ: trivial image1444-D4.10D18288,364

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