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A272974 as a triangular array

1
11
101
1111
10001
100001
1000001
10300301
100000001
1020000201
10000000001
102040040201
1000000000001
10202000020201
100

A272974 as a square array

111111111111111
10100000000000
1100030202020
10000000000
1000000402
103000000
10000000
1020400
100000
10202
1000
102
10
1

A272974 as an upper right triangle

111111111111111
10100000000000
1100030202020
10000000000
1000000402
103000000
10000000
1020400
100000
10202
1000
102
10
1

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Last modified December 8 10:59 EST 2021. Contains 349594 sequences. (Running on oeis4.)