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A330661 as a triangular array

1
12
123
1345
13567
15891011
15912131415
18131819202122
1819222627282930
1132230373839404142
113304146515253545556
12044596271727374757677

A330661 as a square array

111111111111
22335588131320
345891319223044
569121822304159
710131926374662
11142027385171
152128395272
2229405373
30415474
425575
5676
77
111111111111
22335588131320
345891319223044
569121822304159
710131926374662
11142027385171
152128395272
2229405373
30415474
425575
5676
77