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A264520 as a triangular array

1
10
101
2130
42901
644236120
9819622814401
121664414441644576460
1632211680181876910368211601
24646854445211691951866246518282811770
36128222012582641525225

A264520 as a square array

111246912162436
001248163264128
139421966442116685422201
00362281444801844521258264
1121441644187691691951525225
0057610368186624
146211665182
008281
1177
0
111246912162436
001248163264128
139421966442116685422201
00362281444801844521258264
1121441644187691691951525225
0057610368186624
146211665182
008281
1177
0