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A129686 as a triangular array

1
01
101
0101
00101
000101
0000101
00000101
000000101
0000000101
00000000101
000000000101

A129686 as a square array

101000000000
10100000000
1010000000
101000000
10100000
1010000
101000
10100
1010
101
10
1
101000000000
10100000000
1010000000
101000000
10100000
1010000
101000
10100
1010
101
10
1