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A181657 as a triangular array

1
11
111
3211
32111
753211
7532111
1712753211
17127532111
41291712753211
412917127532111

A181657 as a square array

111337717174141
11225512122929
11133771717
1122551212
1113377
112255
11133
1122
111
11
1

A181657 as an upper right triangle

111337717174141
11225512122929
11133771717
1122551212
1113377
112255
11133
1122
111
11
1

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)