A045847 - OEIS

A045847 as a triangular array

1

1 0

1 1 0

1 2 0 0

1 3 1 0 0

1 4 3 0 1 0

1 5 6 1 2 0 0

1 6 10 4 3 2 0 0

1 7 15 10 5 6 0 0 0

1 8 21 20 10 12 3 0 0 0

1 9 28 35 21 21 12 0 1 1 0

1 10 36 56 42 36 30 4 3 2 0 0

1 11 45 84 78 63 61 20 6 6 2 0 0

1 1 1 1 1 1 1 1 1 1 1 1 1

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

0 0 1 3 6 10 15 21 28 36 45

0 0 0 1 4 10 20 35 56 84

0 1 2 3 5 10 21 42 78

0 0 2 6 12 21 36 63

0 0 0 3 12 30 61

0 0 0 0 4 20

0 0 1 3 6

0 1 2 6

0 0 2

0 0

0