A180171 - OEIS

A180171 as a triangular array

1

1 1

1 2 1

1 3 3 1

1 4 6 4 1

1 5 4 10 5 1

1 6 9 12 15 6 1

1 7 9 19 15 21 7 1

1 8 10 24 30 20 28 8 1

1 9 12 36 26 54 28 36 9 1

1 10 15 40 50 60 70 40 45 10 1

1 11 13 53 50 108 70 106 39 55 11 1

1 12 18 60 75 120

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

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

1 3 6 4 9 9 10 12 15 13 18

1 4 10 12 19 24 36 40 53 60

1 5 15 15 30 26 50 50 75

1 6 21 20 54 60 108 120

1 7 28 28 70 70

1 8 36 40 106

1 9 45 39

1 10 55

1 11

1