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A237391 as a triangular array

81
434434
233632402336
12624243402434012624
6806418376425593718376468064
3665681379886271248627124861379886366568
197694010406596287329724120419828732972104065961976940
1065756078612538

A237391 as a square array

8143423361262468064366568197694010657560
43432402434018376413798861040659678612538
233624340255937271248628732972
12624183764271248641204198
68064137988628732972
36656810406596
1976940
8143423361262468064366568197694010657560
43432402434018376413798861040659678612538
233624340255937271248628732972
12624183764271248641204198
68064137988628732972
36656810406596
1976940