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A126890 formatted as a triangular array:

0
1 2
3 5 7
6 9 12 15
10 14 18 22 26
15 20 25 30 35 40
21 27 33 39 45 51 57
28 35 42 49 56 63 70 77
36 44 52 60 68 76 84 92 100
45 54 63 72 81 90 99 108 117 126
55 65 75 85 95 105 115 125 135 145 155

A126890 formatted as a square array:

0 1 3 6 10 15 21 28 36 45 55
2 5 9 14 20 27 35 44 54 65
7 12 18 25 33 42 52 63 75
15 22 30 39 49 60 72 85
26 35 45 56 68 81 95
40 51 63 76 90 105
57 70 84 99 115
77 92 108 125
100 117 135
126 145
155

A126890 formatted as an upper right triangle:

0 1 3 6 10 15 21 28 36 45 55
2 5 9 14 20 27 35 44 54 65
7 12 18 25 33 42 52 63 75
15 22 30 39 49 60 72 85
26 35 45 56 68 81 95
40 51 63 76 90 105
57 70 84 99 115
77 92 108 125
100 117 135
126 145
155

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.


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