A076221 as tables, graphs or sounds

A076221 formatted as a triangular array:

0

1 1

2 2 2

3 2 3 2

4 3 4 3 4

5 3 4 3 5 2

6 4 5 4 6 3 6

7 4 6 4 7 3 7 4

8 5 6 5 8 3 8 5 6

9 5 7 5 8 3 9 5 7 4

10 6 8 6 9 4 10 6 8 5 10

11 6 8 6 10 4 11 6 8 5 11 4

12 7 9 7 11 5 12 7 9 6 12 5 12

0 1 2 3 4 5 6 7 8 9 10 11 12

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

2 3 4 4 5 6 6 7 8 8 9

2 3 3 4 4 5 5 6 6 7

4 5 6 7 8 8 9 10 11

2 3 3 3 3 4 4 5

6 7 8 9 10 11 12

4 5 5 6 6 7

6 7 8 8 9

4 5 5 6

10 11 12

4 5

12