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A264560 as a triangular array

1
11
231
424152
123168881564
366080846725836820328
144149824174441606619449670191363091224
57657288965356808640

A264560 as a square array

11241236144576
132431660801498245728896
11588884672174441605356808640
21565836866194496
420327019136
830912
24
11241236144576
132431660801498245728896
11588884672174441605356808640
21565836866194496
420327019136
830912
24