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A158893 as a triangular array

1
81
1521
22321
294321
3654321
43654321
507654321
5787654321
64987654321

A158893 as a square array

181522293643505764
123456789
12345678
1234567
123456
12345
1234
123
12
1
181522293643505764
123456789
12345678
1234567
123456
12345
1234
123
12
1