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A130418 as a triangular array

1
13
157
15711
17111317
1711131719
1111317192329
111131719232931
11113171923293137
1111317192329313741
113171923293137414347
1131719232931374143

A130418 as a square array

111111111111
35577111111111313
771111131313131717
111313171717171919
1717191919192323
19232323232929
292929293131
3131313737
37374141
414343
47

A130418 as an upper right triangle

111111111111
35577111111111313
771111131313131717
111313171717171919
1717191919192323
19232323232929
292929293131
3131313737
37374141
414343
47

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Last modified April 19 18:58 EDT 2024. Contains 371798 sequences. (Running on oeis4.)