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A128228 formatted as a triangular array:

1
2 2
3 6 3
4 8 12 4
5 10 15 20 5
6 12 18 24 30 6
7 14 21 28 35 42 7
8 16 24 32 40 48 56 8
9 18 27 36 45 54 63 72 9
10 20 30 40 50 60 70 80 90 10

A128228 formatted as a square array:

1 2 3 4 5 6 7 8 9 10
2 6 8 10 12 14 16 18 20
3 12 15 18 21 24 27 30
4 20 24 28 32 36 40
5 30 35 40 45 50
6 42 48 54 60
7 56 63 70
8 72 80
9 90
10

A128228 formatted as an upper right triangle:

1 2 3 4 5 6 7 8 9 10
2 6 8 10 12 14 16 18 20
3 12 15 18 21 24 27 30
4 20 24 28 32 36 40
5 30 35 40 45 50
6 42 48 54 60
7 56 63 70
8 72 80
9 90
10

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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