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A257142 as a triangular array

1
31
871
2134121
5514189181
144534522186251
377190526511445340331
98765121219893703350568421
2584215575221153533268046881889521

A257142 as a square array

13821551443779872584
17341415341905651221557
1128952226511219852211
1181861445937053533
125340335026804
1335686881
142889
152
1
13821551443779872584
17341415341905651221557
1128952226511219852211
1181861445937053533
125340335026804
1335686881
142889
152
1