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A210381 as a triangular array

1
02
013
0134
01465
01510106
0161520157
017213535218
01828567056289
0193684126126843610
0110451202102522101204511

A210381 as a square array

10000000000
2111111111
3345678910
46101521283645
51020355684120
6153570126210
72156126252
82884210
936120
1045
11
10000000000
2111111111
3345678910
46101521283645
51020355684120
6153570126210
72156126252
82884210
936120
1045
11