A052249 - OEIS

A052249 as a triangular array

1

1 1

0 2 1

0 1 3 1

0 0 2 4 1

0 0 1 4 5 1

0 0 0 2 6 6 1

0 0 0 1 4 9 7 1

0 0 0 0 2 7 12 8 1

0 0 0 0 1 4 11 16 9 1

0 0 0 0 0 2 7 16 20 10 1

0 0 0 0 0 1 4 12 23 25 11 1

0 0 0 0 0 0 2 7 18 31 30 12 1

0 0

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

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

1 3 2 1 0 0 0 0 0 0 0

1 4 4 2 1 0 0 0 0 0

1 5 6 4 2 1 0 0 0

1 6 9 7 4 2 1 0

1 7 12 11 7 4 2

1 8 16 16 12 7

1 9 20 23 18

1 10 25 31

1 11 30

1 12

1