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A251351 as a triangular array

51
309309
189939211899
11709508315083111709
72243663307140145366330772243
445797867195739019417390194178671957445797
27510031134451171089569635232476135910895696351134451172751003
16976493

A251351 as a square array

5130918991170972243445797275100316976493
3093921508316633078671957113445117
1899508311401453390194171089569635
11709663307390194172324761359
7224386719571089569635
445797113445117
2751003
5130918991170972243445797275100316976493
3093921508316633078671957113445117
1899508311401453390194171089569635
11709663307390194172324761359
7224386719571089569635
445797113445117
2751003