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A128544 as a triangular array

1
21
342
4993
51624175
6255055338
736901351236113
84914728034325911221
96422451879881253220234
1081324882163821001848106236155

A128544 as a square array

12345678910
149162536496481
29245090147224324
31755135280518882
5331233437981638
8612598122100
131125321848
212021062
34361
55
12345678910
149162536496481
29245090147224324
31755135280518882
5331233437981638
8612598122100
131125321848
212021062
34361
55