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A261430 as a triangular array

1
10
100
1000
10100
100000
1012300
10000000
1010901500
10020040000
1010324105010500
1000020000000
10129017502625224094500

A261430 as a square array

1111111111111
000000000000
00101010101
0002002002
003090309
0000024200
0015401050175
000000
0010502625
0002240
00945
00
0
1111111111111
000000000000
00101010101
0002002002
003090309
0000024200
0015401050175
000000
0010502625
0002240
00945
00
0