Extensions 1→N→G→Q→1 with N=C42:C2 and Q=C2

Direct product G=NxQ with N=C42:C2 and Q=C2
dρLabelID
C2xC42:C232C2xC4^2:C264,195

Semidirect products G=N:Q with N=C42:C2 and Q=C2
extensionφ:Q→Out NdρLabelID
C42:C2:1C2 = C23.C23φ: C2/C1C2 ⊆ Out C42:C2164C4^2:C2:1C264,91
C42:C2:2C2 = C23.24D4φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2:2C264,97
C42:C2:3C2 = C23.37D4φ: C2/C1C2 ⊆ Out C42:C216C4^2:C2:3C264,99
C42:C2:4C2 = C42:C22φ: C2/C1C2 ⊆ Out C42:C2164C4^2:C2:4C264,102
C42:C2:5C2 = C23.19D4φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2:5C264,163
C42:C2:6C2 = C22.11C24φ: C2/C1C2 ⊆ Out C42:C216C4^2:C2:6C264,199
C42:C2:7C2 = C23.33C23φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2:7C264,201
C42:C2:8C2 = C22.19C24φ: C2/C1C2 ⊆ Out C42:C216C4^2:C2:8C264,206
C42:C2:9C2 = C23.36C23φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2:9C264,210
C42:C2:10C2 = C22.29C24φ: C2/C1C2 ⊆ Out C42:C216C4^2:C2:10C264,216
C42:C2:11C2 = C23.38C23φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2:11C264,217
C42:C2:12C2 = C22.34C24φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2:12C264,221
C42:C2:13C2 = C22.36C24φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2:13C264,223
C42:C2:14C2 = C22.45C24φ: C2/C1C2 ⊆ Out C42:C216C4^2:C2:14C264,232
C42:C2:15C2 = C22.46C24φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2:15C264,233
C42:C2:16C2 = C22.47C24φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2:16C264,234
C42:C2:17C2 = C22.49C24φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2:17C264,236
C42:C2:18C2 = C22.50C24φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2:18C264,237
C42:C2:19C2 = C4xC4oD4φ: trivial image32C4^2:C2:19C264,198

Non-split extensions G=N.Q with N=C42:C2 and Q=C2
extensionφ:Q→Out NdρLabelID
C42:C2.1C2 = C4.9C42φ: C2/C1C2 ⊆ Out C42:C2164C4^2:C2.1C264,18
C42:C2.2C2 = C42:6C4φ: C2/C1C2 ⊆ Out C42:C216C4^2:C2.2C264,20
C42:C2.3C2 = M4(2):4C4φ: C2/C1C2 ⊆ Out C42:C2164C4^2:C2.3C264,25
C42:C2.4C2 = C23.38D4φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2.4C264,100
C42:C2.5C2 = C42.6C22φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2.5C264,105
C42:C2.6C2 = C23.25D4φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2.6C264,108
C42:C2.7C2 = M4(2):C4φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2.7C264,109
C42:C2.8C2 = C42.7C22φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2.8C264,114
C42:C2.9C2 = C23.20D4φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2.9C264,166
C42:C2.10C2 = C23.32C23φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2.10C264,200
C42:C2.11C2 = C23.37C23φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2.11C264,214
C42:C2.12C2 = C22.35C24φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2.12C264,222
C42:C2.13C2 = C23.41C23φ: C2/C1C2 ⊆ Out C42:C232C4^2:C2.13C264,225
C42:C2.14C2 = C8o2M4(2)φ: trivial image32C4^2:C2.14C264,86

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