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A290054 as a triangular array

1
10
110
1200
13100
143000
1561000
161040000
17151010000
182120500010
19283515100200
1103656356003200
111458470211046000

A290054 as a square array

1111111111111
01234567891011
00136101521283645
000141020355684
000015153570
000001621
0000001
000000
01234
0026
000
00
0
1111111111111
01234567891011
00136101521283645
000141020355684
000015153570
000001621
0000001
000000
01234
0026
000
00
0