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A236640 as a triangular array

81
474474
279641762796
16588370183701816588
9836833418049907233418098368
5823042988228688962868896282988228582304
3448740267556849375487114874325493754871267556843448740
20433016

A236640 as a square array

8147427961658898368582304344874020433016
474417637018334180298822826755684
279637018499072688962893754871
165883341806889628148743254
98368298822893754871
58230426755684
3448740
8147427961658898368582304344874020433016
474417637018334180298822826755684
279637018499072688962893754871
165883341806889628148743254
98368298822893754871
58230426755684
3448740