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A108286 as a triangular array

1
31
641
101151
15261861
2157582771
281201791123881
362475434531945191
455021636181897531066101

A108286 as a square array

136101521283645
14112657120247502
1518581795431636
16271124531818
1738194975
1851310
1966
110
1
136101521283645
14112657120247502
1518581795431636
16271124531818
1738194975
1851310
1966
110
1