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A121424 as a triangular array

1
11
123
13718
141243170
1518764032220
1625118711518837149
17331701107905485569758814
1842233160513986147471172529118301950
1952308222020171225363293817641145705

A121424 as a square array

1111111111
123456789
37121825334252
184376118170233308
170403711110716052220
2220518890541398620171
3714985569147471225363
75881417252912938176
1830195041145705
1111111111
123456789
37121825334252
184376118170233308
170403711110716052220
2220518890541398620171
3714985569147471225363
75881417252912938176
1830195041145705