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A212891 as a triangular array

1
64
20179
50463416
105100845725
1961901701348636
33632930526019612149
54053250445037027016264
82581678472162550035620981
1210120011641092980830650454262

A212891 as a square array

1620501051963365408251210
417461001903295328161200
934841703055047841164
16571342604507211092
2586196370625980
36121270500830
49162356650
64209454
81262
1620501051963365408251210
417461001903295328161200
934841703055047841164
16571342604507211092
2586196370625980
36121270500830
49162356650
64209454
81262