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A305340 as a triangular array

1
22
444
8558
16912916
322226262232
64456281624564
128101166267267166101128
2562184319381185938431218256
512477109131865296529631861091477512
10241041281210840

A305340 as a square array

12481632641282565121024
245922451012184771041
4512266216643110912812
892681267938318610840
16226226711855296
32451669385296
641014313186
1282181091
256477
512
12481632641282565121024
245922451012184771041
4512266216643110912812
892681267938318610840
16226226711855296
32451669385296
641014313186
1282181091
256477
512