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A083857 as a triangular array

0
01
013
0137
013815
01392131
01310275563
013113381144127
0131239109243377255
0131345139360729987511
01314511714951189218725841023
0131557205648

A083857 as a square array

000000000000
11111111111
3333333333
789101112131415
1521273339455157
315581109139171205
63144243360495648
1273777291189
2559872187
5112584
1023
000000000000
11111111111
3333333333
789101112131415
1521273339455157
315581109139171205
63144243360495648
1273777291189
2559872187
5112584
1023