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A338876 as a triangular array

1
11
121
1661
1136241
13018014401201
1310801152024007201
142907224192002016000181440050401
1190720116121606048000043545600012700800403201
19077763317760069120000548674560000213373440008128512003628801

A338876 as a square array

1111111111
126130342190
163618010809072907207776
12414401152024192001161216033177600
1120240020160006048000069120000
17201814400435456000548674560000
150401270080021337344000
140320812851200
1362880
1
1111111111
126130342190
163618010809072907207776
12414401152024192001161216033177600
1120240020160006048000069120000
17201814400435456000548674560000
150401270080021337344000
140320812851200
1362880
1