A138530 as tables, graphs or sounds

A138530 formatted as a triangular array:

1

2 1

3 2 1

4 1 2 1

5 2 3 2 1

6 2 2 3 2 1

7 3 3 4 3 2 1

8 1 4 2 4 3 2 1

9 2 1 3 5 4 3 2 1

10 2 2 4 2 5 4 3 2 1

11 3 3 5 3 6 5 4 3 2 1

12 2 2 3 4 2 6 5 4 3 2 1

13 3 3 4 5 3 7 6 5 4 3 2 1

1 2 3 4 5 6 7 8 9 10 11 12 13

1 2 1 2 2 3 1 2 2 3 2 3

1 2 3 2 3 4 1 2 3 2 3

1 2 3 4 2 3 4 5 3 4

1 2 3 4 5 2 3 4 5

1 2 3 4 5 6 2 3

1 2 3 4 5 6 7

1 2 3 4 5 6

1 2 3 4 5

1 2 3 4

1 2 3

1 2

1