A030528 - OEIS

A030528 as a triangular array

1

1 1

0 2 1

0 1 3 1

0 0 3 4 1

0 0 1 6 5 1

0 0 0 4 10 6 1

0 0 0 1 10 15 7 1

0 0 0 0 5 20 21 8 1

0 0 0 0 1 15 35 28 9 1

0 0 0 0 0 6 35 56 36 10 1

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

0 0 0 0 0 0 7 56 126 120 55 12 1

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

1 2 1 0 0 0 0 0 0 0 0 0

1 3 3 1 0 0 0 0 0 0 0

1 4 6 4 1 0 0 0 0 0

1 5 10 10 5 1 0 0 0

1 6 15 20 15 6 1 0

1 7 21 35 35 21 7

1 8 28 56 70 56

1 9 36 84 126

1 10 45 120

1 11 55

1 12

1