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A243641 as a triangular array

4
48
4916
492132
49215064
492151120128
492151127289256
492151127323697512
49215112732483516821024
492151127324844218740602048
4921511273248442242578798014096
4

A243641 as a square array

444444444444
8999999999
162121212121212121
3250515151515151
64120127127127127127
128289323324324324
256697835844844
512168221872242
102440605787
20489801
4096
444444444444
8999999999
162121212121212121
3250515151515151
64120127127127127127
128289323324324324
256697835844844
512168221872242
102440605787
20489801
4096