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A209690 as a triangular array

1
21
141
1371
129111
12622161
1251946221
125145486291
1251342135148371
1251335124302239461
125133499341617367561
1251334902878601171

A209690 as a square array

121111111111
14322222222
1796555555
11122191413131313
116465442353434
122861351249990
129148302341287
137239617860
1463671171
156
1

A209690 as an upper right triangle

121111111111
14322222222
1796555555
11122191413131313
116465442353434
122861351249990
129148302341287
137239617860
1463671171
156
1

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Last modified April 19 16:03 EDT 2024. Contains 371794 sequences. (Running on oeis4.)