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A154715 as a triangular array

1
23
41816
881192125
16324153625001296
32121510240312503888016807
64437461440312500699840705894262144
128153093440642734375979776017294403146800644782969

A154715 as a square array

1248163264128
318813241215437415309
1619215361024061440344064
1252500312503125002734375
1296388806998409797760
1680770589417294403
26214414680064
4782969
1248163264128
318813241215437415309
1619215361024061440344064
1252500312503125002734375
1296388806998409797760
1680770589417294403
26214414680064
4782969