A172497 - OEIS

A172497 as a triangular array

1

1 1

1 1 1

1 1 1 1

1 2 2 2 1

1 1 2 2 1 1

1 2 2 4 2 2 1

1 3 6 6 6 6 3 1

1 2 6 12 6 12 6 2 1

1 4 8 24 24 24 24 8 4 1

1 3 12 24 36 72 36 24 12 3 1

1 5 15 60 60 180 180 60 60 15 5 1

1 5 25 75 150 300 450 300 150 75 25 5 1

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

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

1 1 2 2 2 6 6 8 12 15 25

1 2 2 4 6 12 24 24 60 75

1 1 2 6 6 24 36 60 150

1 2 6 12 24 72 180 300

1 3 6 24 36 180 450

1 2 8 24 60 300

1 4 12 60 150

1 3 15 75

1 5 25

1 5

1