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A338874 as a triangular array

1
11
121
1661
1136241
13018014401201
1110801152072007201
14290722419200672000181440050401
119072023224326048000043545600012700800403201
13038880232243200207360000548674560000213373440002709504003628801

A338874 as a square array

1111111111
126130142130
1636180108090729072038880
12414401152024192002322432232243200
1120720067200060480000207360000
17201814400435456000548674560000
150401270080021337344000
140320270950400
1362880
1
1111111111
126130142130
1636180108090729072038880
12414401152024192002322432232243200
1120720067200060480000207360000
17201814400435456000548674560000
150401270080021337344000
140320270950400
1362880
1