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A253350 as a triangular array

16
4747
125173125
335724735335
907316048003192907
2470138103115630920139172470
674060368200740305872199512607796740
18406263920129401630069363013228128596026560518406
502781153880

A253350 as a square array

1647125335907247067401840650278
47173724316013810603682639201153880
1257354800311562007401294016
3353192309203058723006936
907139171995123013228
2470607791285960
6740265605
18406
1647125335907247067401840650278
47173724316013810603682639201153880
1257354800311562007401294016
3353192309203058723006936
907139171995123013228
2470607791285960
6740265605
18406