C# Lydian scale
The C# Lydian scale has the formula 1, 2, 3, #4, 5, 6, 7 with notes C#, D#, F, G, G#, A#, C
The Lydian scale is the fourth of the seven modes. It is similar to the major scale, but with a sharp 4th note. It is sometimes used in jazz which makes use of the sharp 11th in chords, and is also known for its use in Polish folk music.