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A009998 as a triangular array

1
11
121
1431
18941
116271651
13281642561
1642432561253671
112872910246252164981
125621874096312512963436491
1512656116384156257776240151281101

A009998 as a square array

11111111111
1248163264128256512
139278124372921876561
1416642561024409616384
1525125625312515625
163621612967776
17493432401
1864512
1981
110
1

A009998 as an upper right triangle

11111111111
1248163264128256512
139278124372921876561
1416642561024409616384
1525125625312515625
163621612967776
17493432401
1864512
1981
110
1

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Last modified April 24 17:29 EDT 2024. Contains 371962 sequences. (Running on oeis4.)