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A235421 as a triangular array

81
432432
230450222304
950460879602319504
39204543946160734353386839204
138402489550533361964334119014740889138402
48860135230388681329430178220916469289608733788761488601
1553877

A235421 as a square array

8143223049504392041384024886011553877
432502260879543946489550535230388
230460231160734333361964681329430
9504533868334119011782209164
392044740889692896087
13840233788761
488601
8143223049504392041384024886011553877
432502260879543946489550535230388
230460231160734333361964681329430
9504533868334119011782209164
392044740889692896087
13840233788761
488601