A13 chord
The A dominant thirteenth chord (abbreviated "A13 chord") is a seven-note chord consisting of the notes A, C♯, E, G, B, D, and F♯. The chord is formed by adding a thirteenth to a A dominant eleventh chord.
In practice, the fifth (E) and eleventh (D) are often omitted from the A13 chord to avoid a very dissonant sound, and because it's not always possible to play all notes simultaneously.
Name
A dominant thirteenth chord
Notes
A C♯ E G B D F♯
Intervals
1 3 5 ♭7 9 11 13
Chord symbol
A13
Type
Heptad (seven-note chord)