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A266972 as a triangular array

1
10
1-10
1-210
1-46-30
1-615-1770
1-936-7578-310
1-1266-202351-3191150
1-16120-5241400-22361930-6750
1-20190-10803925-916413186-1048934510
1-25300-220010650-3473075170-10254578610-252310

A266972 as a square array

11111111111
0-1-2-4-6-9-12-16-20-25
016153666120190300
0-3-17-75-202-524-1080-2200
07783511400392510650
0-31-319-2236-9164-34730
011519301318675170
0-675-10489-102545
0345178610
0-25231
0

A266972 as an upper right triangle

11111111111
0-1-2-4-6-9-12-16-20-25
016153666120190300
0-3-17-75-202-524-1080-2200
07783511400392510650
0-31-319-2236-9164-34730
011519301318675170
0-675-10489-102545
0345178610
0-25231
0

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Last modified August 4 09:03 EDT 2020. Contains 336201 sequences. (Running on oeis4.)