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A220504 as a triangular array

1
21
401
7201
121001
1942001
30310001
458120001
6774100001
971531200001
13915411000001
195278412000001
2722983110000001

A220504 as a square array

1247121930456797139195272
1021438715152729
10021143488
1000211143
100002111
10000021
1000000
100000
10000
1000
100
10
1
1247121930456797139195272
1021438715152729
10021143488
1000211143
100002111
10000021
1000000
100000
10000
1000
100
10
1