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A287957 as a triangular array

1
11
121
1111
12321
111111
1214121
11311311
121252121
1111111111
12321612321
111111111111
121212721

A287957 as a square array

1111111111111
121212121212
11311311311
1214121212
111151111
12321612
1111117
121212
11311
121
11
1

A287957 as an upper right triangle

1111111111111
121212121212
11311311311
1214121212
111151111
12321612
1111117
121212
11311
121
11
1

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Last modified June 21 01:12 EDT 2021. Contains 345339 sequences. (Running on oeis4.)