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A075497 as a triangular array

1
21
461
828121
16120100201
32496720260301
64201648162800560421
1288128309122721684001064561
25632640193600248640111216211681848721

A075497 as a square array

1248163264128256
16281204962016812832640
112100720481630912193600
120260280027216248640
1305608400111216
142106421168
1561848
172
1
1248163264128256
16281204962016812832640
112100720481630912193600
120260280027216248640
1305608400111216
142106421168
1561848
172
1