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A253468 as a triangular array

81
540540
36408003640
242081400140024208
162016307220003072162016
108150485362600260085361081504
722709615888500037445000158887227096
482721604446477847496749677844446448272160

A253468 as a square array

815403640242081620161081504722709648272160
5408001400307285361588844464
364014002000260050007784
242083072260037447496
162016853650007496
1081504158887784
722709644464
48272160
815403640242081620161081504722709648272160
5408001400307285361588844464
364014002000260050007784
242083072260037447496
162016853650007496
1081504158887784
722709644464
48272160