A180177 - OEIS

A180177 as a triangular array

1

0 1

1 0 1

1 2 0 1

1 2 3 0 1

1 3 3 4 0 1

1 4 6 4 5 0 1

1 5 9 10 5 6 0 1

1 6 13 16 15 6 7 0 1

1 7 18 26 25 21 7 8 0 1

1 8 24 40 45 36 28 8 9 0 1

1 9 31 59 75 71 49 36 9 10 0 1

1 10 39 84 120 126 105 64 45 10 11 0 1

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

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

1 0 3 3 6 9 13 18 24 31 39

1 0 4 4 10 16 26 40 59 84

1 0 5 5 15 25 45 75 120

1 0 6 6 21 36 71 126

1 0 7 7 28 49 105

1 0 8 8 36 64

1 0 9 9 45

1 0 10 10

1 0 11

1 0

1