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A374439 as a triangular array

1
12
121
1222
12341
124632
1258661
12610101242
1271215201081
128142130202052
129162842354015101
12101836565670353062

A374439 as a square array

111111111111
22222222222
12345678910
24681012141618
1361015212836
261220304256
1410203556
28204070
151535
21030
16
2
111111111111
22222222222
12345678910
24681012141618
1361015212836
261220304256
1410203556
28204070
151535
21030
16
2