A122848 - OEIS

A122848 as a triangular array

1

0 1

0 1 1

0 0 3 1

0 0 3 6 1

0 0 0 15 10 1

0 0 0 15 45 15 1

0 0 0 0 105 105 21 1

0 0 0 0 105 420 210 28 1

0 0 0 0 0 945 1260 378 36 1

0 0 0 0 0 945 4725 3150 630 45 1

0 0 0 0 0 0 10395 17325 6930 990 55 1

0 0

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 3 3 0 0 0 0 0 0 0

1 6 15 15 0 0 0 0 0

1 10 45 105 105 0 0 0

1 15 105 420 945 945 0

1 21 210 1260 4725 10395

1 28 378 3150 17325

1 36 630 6930

1 45 990

1 55

1