A280500 - OEIS

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A280500 as a triangular array

1

0 2

0 1 3

0 0 0 4

0 0 1 2 5

0 0 0 0 0 6

0 0 0 1 3 3 7

0 0 0 0 0 2 0 8

0 0 0 0 1 0 0 4 9

0 0 0 0 0 0 0 0 0 10

0 0 0 0 0 1 0 2 7 5 11

0 0 0 0 0 0 0 0 0 6 0 12

0 0 0 0 0 0 1 0 0 0 0 6 13

0 0 0 0 0 0 0 0 0 2 0 4 0 14

0 0 0 0 0 0 0 1 3 3 0 3 0 7 15

A280500 as a square array

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

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

3 0 1 0 0 0 0 0 0 0 0 0 0

4 2 0 1 0 0 0 0 0 0 0 0

5 0 3 0 1 0 0 0 0 0 0

6 3 2 0 0 1 0 0 0 0

7 0 0 0 0 0 1 0 0

8 4 0 2 0 0 0 1

9 0 7 0 0 0 3

10 5 6 0 2 3

11 0 0 0 0

12 6 4 3

13 0 0

14 7

15

A280500 as an upper right triangle