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A203550 as a triangular array

1
11
1251
14304301
147733292047731
14804615259651525965480461
150446467657718276550270676577185044641
1544848232511567314890425829448904258294325115673154484821
158647145

A203550 as a square array

111111111
125430477348046504464544848258647145
1430329201525965676577183251156731
14773152596527655027048904258294
1480466765771848904258294
15044643251156731
15448482
1
111111111
125430477348046504464544848258647145
1430329201525965676577183251156731
14773152596527655027048904258294
1480466765771848904258294
15044643251156731
15448482
1