A278492 - OEIS

A278492 as a triangular array

1

2 1

3 3 1

4 5 3 1

5 7 7 3 1

6 9 9 7 3 1

7 11 13 13 7 3 1

8 13 15 15 13 7 3 1

9 15 19 19 19 13 7 3 1

10 17 21 25 25 19 13 7 3 1

11 19 25 27 27 27 19 13 7 3 1

12 21 27 31 31 31 27 19 13 7 3 1

13 23 31 37 39 39 39 27 19 13 7 3 1

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

1 3 5 7 9 11 13 15 17 19 21 23

1 3 7 9 13 15 19 21 25 27 31

1 3 7 13 15 19 25 27 31 37

1 3 7 13 19 25 27 31 39

1 3 7 13 19 27 31 39

1 3 7 13 19 27 39

1 3 7 13 19 27

1 3 7 13 19

1 3 7 13

1 3 7

1 3

1