A013942 as tables, graphs or sounds

A013942 formatted as a triangular array:

2

1 4

2 1 1

6 3 2 1

1 1 8 4 2

2 1 1 1 1 10

5 3 2 2 1 1 1

1 1 12 6 4 3 2 2

1 1 1 1 1 1 14 7 4

3 2 2 2 1 1 1 1 1 1

1 16 8 5 4 3 2 2 2 1 1

1 1 1 1 1 1 18 9 6 4 3 3

2 2 2 1 1 1 1 1 1 1 1 20 10

2 1 2 6 1 2 5 1 1 3 1 1 2

4 1 3 1 1 3 1 1 2 16 1 2

1 2 8 1 2 12 1 2 8 1 2

1 4 1 2 6 1 2 5 1 1

2 1 1 4 1 1 4 1 1

10 1 3 1 1 3 1 1

1 2 14 1 2 18 1

2 7 1 2 9 1

4 1 2 6 1

1 1 4 1

1 3 1

3 20

10