A026729 as tables, graphs or sounds

A026729 formatted as a triangular array:

1

0 1

0 1 1

0 0 2 1

0 0 1 3 1

0 0 0 3 4 1

0 0 0 1 6 5 1

0 0 0 0 4 10 6 1

0 0 0 0 1 10 15 7 1

0 0 0 0 0 5 20 21 8 1

0 0 0 0 0 1 15 35 28 9 1

0 0 0 0 0 0 6 35 56 36 10 1

0 0 0 0 0 0 1 21 70 84 45 11 1

1 0 0 0 0 0 0 0 0 0 0 0 0

1 1 0 0 0 0 0 0 0 0 0 0

1 2 1 0 0 0 0 0 0 0 0

1 3 3 1 0 0 0 0 0 0

1 4 6 4 1 0 0 0 0

1 5 10 10 5 1 0 0

1 6 15 20 15 6 1

1 7 21 35 35 21

1 8 28 56 70

1 9 36 84

1 10 45

1 11

1