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A210219 as a triangular array

1
21
341
4971
51622111
6255046161
7369513086221
849161295296148291
964252581791610239371
10813721036179218971163367461
1110052517163612490041662083541561

A210219 as a square array

1234567891011
149162536496481100
17225095161252372525
1114613029558110361716
1168629679117923612
12214861018974900
12923911634166
1373672083
146541
156
1
1234567891011
149162536496481100
17225095161252372525
1114613029558110361716
1168629679117923612
12214861018974900
12923911634166
1373672083
146541
156
1