Sub travdem()
Dim Compt1 As Long, i As Long
With Sheets(ActiveSheet.Name)
For i = 54 + 49 To 500 Step 49
.Range("a" & i & ":a" & i + 2).EntireRow.Insert , CopyOrigin:=xlFormatFromLeftOrAbove
.Range("A51:I53").copy _
Destination:=.Range("a" & i)
Next i
End With
End Sub