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A279409 as a triangular array

1
11
111
2224
22245
333669
33367910
44488121216
4448912131618
55510101515202025
5551011151620222527
666121218182424303036

A279409 as a square array

111223344556
11223344556
1223344556
446688101012
56789101112
991212151518
101213151618
1616202024
18202224
252530
2730
36
111223344556
11223344556
1223344556
446688101012
56789101112
991212151518
101213151618
1616202024
18202224
252530
2730
36