A087735 - OEIS

A087735 as a triangular array

1

2 2

3 2 3

4 4 4 4

5 4 4 4 5

6 6 4 4 6 6

7 6 7 4 7 6 7

8 8 8 8 8 8 8 8

9 8 8 8 8 8 8 8 9

10 10 8 8 8 8 8 8 10 10

11 10 11 8 8 8 8 8 11 10 11

12 12 12 12 8 8 8 8 12 12 12 12

13 12 12 12 13 8 8 8 13 12 12 12 13

1 2 3 4 5 6 7 8 9 10 11 12 13

2 2 4 4 6 6 8 8 10 10 12 12

3 4 4 4 7 8 8 8 11 12 12

4 4 4 4 8 8 8 8 12 12

5 6 7 8 8 8 8 8 13

6 6 8 8 8 8 8 8

7 8 8 8 8 8 8

8 8 8 8 8 8

9 10 11 12 13

10 10 12 12

11 12 12

12 12

13