piano chord
F13
F1A3C5E♭♭7G9D13
Seven notes in theory and four or five in anyone’s hands: root, third, seventh and thirteenth carry it.
What is true of it
F13 is F, A, C, E♭, G and D — 1, 3, 5, b7, 9 and 13 counted from F.
On an instrument that cannot reach all 6, the 5, 9 and 1 go first, in that order.