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A259691 as a triangular array

1
11
221
5631
15201241
5274512051
2033022311043061
877134811165641854271
414065265745319611753005681
21147340143144318944770021904557291

A259691 as a square array

11251552203877414021147
12620743021348652634014
1312512311116574531443
1420104564319618944
153018511757700
16423002190
1756455
1872
19
1
11251552203877414021147
12620743021348652634014
1312512311116574531443
1420104564319618944
153018511757700
16423002190
1756455
1872
19
1