Extensions 1→N→G→Q→1 with N=C2 and Q=D63 
Direct product G=N×Q with N=C2 and Q=D63
Non-split extensions G=N.Q with N=C2 and Q=D63
| extension | φ:Q→Aut N | d | ρ | Label | ID | 
|---|
| C2.D63 = Dic63 | central extension (φ=1) | 252 | 2- | C2.D63 | 252,5 | 
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