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A249866 as a triangular array

1
01
101
0101
10001
010101
1010101
01010001
101000101
0101010101
10001010001
010101010101
1010100010101
010100

A249866 as a square array

10101010101010
1010101010101
100010100010
10101010101
1010001010
100010100
1010100
101010
10001
1010
101
10
1
10101010101010
1010101010101
100010100010
10101010101
1010001010
100010100
1010100
101010
10001
1010
101
10
1