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A276773 as a triangular array

1
12
489
16415051
81225306322323
44113411966216221872188
260183771313815074154741551015511
161295454590266107955112855113584113633113634

A276773 as a square array

1141681441260116129
28412251341837754545
95030619661313890266
51322216215074107955
323218715474112855
218815510113584
15511113633
113634
1141681441260116129
28412251341837754545
95030619661313890266
51322216215074107955
323218715474112855
218815510113584
15511113633
113634