A193517 - OEIS

A193517 as a triangular array

1

1 1

1 1 1

1 1 1 1

1 1 1 1 2

1 1 1 1 3 3

1 1 1 1 4 5 4

1 1 1 1 5 7 7 5

1 1 1 1 6 9 10 9 6

1 1 1 1 7 11 13 13 11 8

1 1 1 1 8 13 16 17 16 17 11

1 1 1 1 9 15 19 21 21 28 27 15

1 1 1 1 10 17 22 25 26 41 49 41 20

1 1 1

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

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

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

1 1 1 1 1 1 1 1 1 1

2 3 4 5 6 7 8 9 10

3 5 7 9 11 13 15 17

4 7 10 13 16 19 22

5 9 13 17 21 25

6 11 16 21 26

8 17 28 41

11 27 49

15 41

20