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A131875 formatted as a triangular array:

1
5 4
12 5 7
22 6 8 10
35 7 9 11 13
51 8 10 12 14 16
70 9 11 13 15 17 19
92 10 12 14 16 18 20 22
117 11 13 15 17 19 21 23 25
145 12 14 16 18 20 22 24 26 28

A131875 formatted as a square array:

1 5 12 22 35 51 70 92 117 145
4 5 6 7 8 9 10 11 12
7 8 9 10 11 12 13 14
10 11 12 13 14 15 16
13 14 15 16 17 18
16 17 18 19 20
19 20 21 22
22 23 24
25 26
28

A131875 formatted as an upper right triangle:

1 5 12 22 35 51 70 92 117 145
4 5 6 7 8 9 10 11 12
7 8 9 10 11 12 13 14
10 11 12 13 14 15 16
13 14 15 16 17 18
16 17 18 19 20
19 20 21 22
22 23 24
25 26
28

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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