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A109974 as a triangular array

1
21
231
3451
271091
462128171
212267382331
4850126273244651
3155025262610577301291
4138534413943126416121882571
2189158524028052156261651365625131

A109974 as a square array

12232424342
13476128151318
1510212650508591
192873126252344585
1178227362613942402
133244105731268052
165730416115626
1129218816513
12576562
1513
1
12232424342
13476128151318
1510212650508591
192873126252344585
1178227362613942402
133244105731268052
165730416115626
1129218816513
12576562
1513
1