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A115310 as a triangular array

1
31
221
7521
64321
537321
4864321
157594321
1464854321
13171171154321
121610610654321
111595913654321
10148148127654321
9131513711157654321

A115310 as a square array

13276541514131211109
125438761716151413
123765411109815
1234987651413
123451110987
123456131211
123456715
1234567
123456
12345
1234
123
12
1

A115310 as an upper right triangle

13276541514131211109
125438761716151413
123765411109815
1234987651413
123451110987
123456131211
123456715
1234567
123456
12345
1234
123
12
1

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)