A180969 - OEIS

A180969 as a triangular array

0

1 0

2 0 0

3 1 0 0

4 1 0 0 0

5 2 0 0 0 0

6 2 1 0 0 0 0

7 3 1 0 0 0 0 0

8 3 1 0 0 0 0 0 0

9 4 1 0 0 0 0 0 0 0

10 4 2 0 0 0 0 0 0 0 0

11 5 2 1 0 0 0 0 0 0 0 0

12 5 2 1 0 0 0 0

0 1 2 3 4 5 6 7 8 9 10 11 12

0 0 1 1 2 2 3 3 4 4 5 5

0 0 0 0 1 1 1 1 2 2 2

0 0 0 0 0 0 0 0 1 1

0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0

0 0 0 0 0 0 0

0 0 0 0 0 0

0 0 0 0

0 0 0

0 0

0