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A254743 as a triangular array

512
28482848
135041978213504
6257913055413055462579
2812137956661209260795666281213
122336746131809683835968383546131801223367
5203324263345677491575610097402274915756263345675203324
21804750

A254743 as a square array

512284813504625792812131223367520332421804750
284819782130554795666461318026334567
135041305541209260968383574915756
625797956669683835100974022
281213461318074915756
122336726334567
5203324
512284813504625792812131223367520332421804750
284819782130554795666461318026334567
135041305541209260968383574915756
625797956669683835100974022
281213461318074915756
122336726334567
5203324