From Jon E. Schoenfield, Aug 11 2022: (Start)
In the diagram below, three octaves (i.e., sets of 12 consecutive keys) have been omitted (as represented by the ellipses):
.
n | 1 2 3 4 5 ... 12 13 14 15
----+-----------------------------------------------------------------
a(n)| 1 2 3 2 3 ... 2 3 2 3
___________________________________..._______________________________
||M|||M|M|||M|M|M|||M|M|||M|M|M|| ||M|M|||M|M|M|||M|M|||M|M|M|| |
||M|||M|M|||M|M|M|||M|M|||M|M|M|| ||M|M|||M|M|M|||M|M|||M|M|M|| |
||_|||_|_|||_|_|_|||_|_|||_|_|_|| ||_|_|||_|_|_|||_|_|||_|_|_|| |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|_| |_|_|_|_|_|_|_|_|_|_|_|_|_|_|_|
A B C D E F G A B C D E F G A B ... C D E F G A B C D E F G A B C
(End)
.
========== PROPOSED ALTERNATIVE VERSION FOLLOWS ==========
======== (NEED TO DELETE ONE OR THE OTHER OR BOTH) =======
.
| |M| | |M||M| | |M||M||M| | | |M||M| | |M||M||M| | |
| |M| | |M||M| | |M||M||M| | | |M||M| | |M||M||M| | |
| |M| | |M||M| | |M||M||M| | | |M||M| | |M||M||M| | |
| |/| | |/||/| | |/||/||/| | | |/||/| | |/||/||/| | |
| |/| | |/||/| | |/||/||/| | | |/||/| | |/||/||/| | |
| |/| | |/||/| | |/||/||/| | | |/||/| | |/||/||/| | |
(End)
.
========== (If, at some point, it's decided to allow ==========
========== extended ASCII characters, then we could ==========
========== do something like the following...) ==========
.
From Jon E. Schoenfield, Aug 11 2022: (Start)
In the diagram below, three octaves (i.e., sets of 12 consecutive keys) have been omitted (as represented by the ellipses):
.
n | 1 2 3 4 5 ... 12 13 14 15
----+-----------------------------------------------------------------
a(n)| 1 2 3 2 3 ... 2 3 2 3
┌─▄─┬─▄─▄─┬─▄─▄─▄─┬─▄─▄─┬─▄─▄─▄─┬...┬─▄─▄─┬─▄─▄─▄─┬─▄─▄─┬─▄─▄─▄─┬─┐
│ █ │ █ █ │ █ █ █ │ █ █ │ █ █ █ │ │ █ █ │ █ █ █ │ █ █ │ █ █ █ │ │
│ █ │ █ █ │ █ █ █ │ █ █ │ █ █ █ │ │ █ █ │ █ █ █ │ █ █ │ █ █ █ │ │
│ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │
└─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴...┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┘
A B C D E F G A B C D E F G A B C D E F G A B C D E F G A B C
|