let
Source = Table.Combine(
List.Transform(
Table.ToRows(Excel.CurrentWorkbook(){[Name="Table1"]}[Content]),
(x)=> let y = Text.ToList(x{0})
in
Table.FromRows({y}, List.Accumulate({1..List.Count(y)}, {}, (s,c)=> s & { "Colonne " & Text.From(c)}))
)
)
in
Source