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

Direct product G=N×Q with N=D18 and Q=D4
dρLabelID
C2×D4×D972C2xD4xD9288,356

Semidirect products G=N:Q with N=D18 and Q=D4
extensionφ:Q→Out NdρLabelID
D181D4 = D18⋊D4φ: D4/C4C2 ⊆ Out D18144D18:1D4288,94
D182D4 = C4⋊D36φ: D4/C4C2 ⊆ Out D18144D18:2D4288,105
D183D4 = C362D4φ: D4/C4C2 ⊆ Out D18144D18:3D4288,148
D184D4 = C223D36φ: D4/C22C2 ⊆ Out D1872D18:4D4288,92
D185D4 = C232D18φ: D4/C22C2 ⊆ Out D1872D18:5D4288,147

Non-split extensions G=N.Q with N=D18 and Q=D4
extensionφ:Q→Out NdρLabelID
D18.1D4 = D83D9φ: D4/C4C2 ⊆ Out D181444-D18.1D4288,122
D18.2D4 = SD163D9φ: D4/C4C2 ⊆ Out D181444D18.2D4288,126
D18.3D4 = D725C2φ: D4/C4C2 ⊆ Out D181444+D18.3D4288,129
D18.4D4 = C23.9D18φ: D4/C22C2 ⊆ Out D18144D18.4D4288,93
D18.5D4 = D18.D4φ: D4/C22C2 ⊆ Out D18144D18.5D4288,104
D18.6D4 = D8⋊D9φ: D4/C22C2 ⊆ Out D18724D18.6D4288,121
D18.7D4 = D72⋊C2φ: D4/C22C2 ⊆ Out D18724+D18.7D4288,124
D18.8D4 = SD16⋊D9φ: D4/C22C2 ⊆ Out D181444-D18.8D4288,125
D18.9D4 = Q16⋊D9φ: D4/C22C2 ⊆ Out D181444D18.9D4288,128
D18.10D4 = C22⋊C4×D9φ: trivial image72D18.10D4288,90
D18.11D4 = C4⋊C4×D9φ: trivial image144D18.11D4288,101
D18.12D4 = D8×D9φ: trivial image724+D18.12D4288,120
D18.13D4 = SD16×D9φ: trivial image724D18.13D4288,123
D18.14D4 = Q16×D9φ: trivial image1444-D18.14D4288,127

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