login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A153271 as a triangular array

5
530
535315
5404406160
5455859945208845
5507501500037500011250000
5559352150562364521827575894930575
56011402964097812039124800183886560099298742400
565136539585146464565909025349317832521308387782514702787569925

A153271 as a square array

555555555
3035404550556065
31544058575093511401365
6160994515000215052964039585
2088453750006236459781201464645
11250000218275753912480065909025
89493057518388656003493178325
99298742400213083877825
14702787569925
555555555
3035404550556065
31544058575093511401365
6160994515000215052964039585
2088453750006236459781201464645
11250000218275753912480065909025
89493057518388656003493178325
99298742400213083877825
14702787569925