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A168292 as a triangular array

7
77
7387
799997
72205462207
7461223622364617
794280011559680019427
719032669789921899212669719037
73824856604635207965944635208566038247
7766526853022243506068400

A168292 as a square array

7777777777
73899220461942190338247665
799546223680012669785660268530
7220223615596899214635202224350
74618001899217965946068400
794226697463520
7190385660
73824
7
7777777777
73899220461942190338247665
799546223680012669785660268530
7220223615596899214635202224350
74618001899217965946068400
794226697463520
7190385660
73824
7