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A330408 as a triangular array

1
22
323
4434
54645
666856
76681067
8868101278
989810121489
101091210121416910
1110121215121416181011
12121212151814161820

A330408 as a square array

123456789101112
22446688101012
336666991212
448888121212
55101010101515
661212121218
7714141414
88161616
991818
101020
11
123456789101112
22446688101012
336666991212
448888121212
55101010101515
661212121218
7714141414
88161616
991818
101020
11