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A198906 as a triangular array

1
11
242
533335
15380121138015
5148015038450384480151
1876200421254256907736212542562004187
7158048338979320494865691294865691289793204804833715
2795104591803794115705

A198906 as a square array

112515511877152795
143338048016200480483310459180
2331211503842125425897932043794115705
5380503846907736948656912
1548012125425948656912
516200489793204
187804833
715

A198906 as an upper right triangle

112515511877152795
143338048016200480483310459180
2331211503842125425897932043794115705
5380503846907736948656912
1548012125425948656912
516200489793204
187804833
715

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Last modified March 28 07:33 EDT 2024. Contains 371235 sequences. (Running on oeis4.)