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A218666 as a triangular array

1
11
112
1224
12449
1378920
13916182048
141230364048115
141838818096115286
152164144180192230286719
1527922164004324605727191842

A218666 as a square array

11111111111
1122334455
2247912182127
4481630386492
99183681144216
20204080180400
484896192432
115115230460
286286572
719719
1842
11111111111
1122334455
2247912182127
4481630386492
99183681144216
20204080180400
484896192432
115115230460
286286572
719719
1842