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A272908 as a triangular array

1
25
378
4101116
613142023
91718252835
12212230334146
1526273639485362
193132424555607077
24373849526368798697
294344565971768895107116

A272908 as a square array

1234691215192429
571013172126313743
81114182227323844
1620253036424956
23283339455259
354148556371
4653606876
62707988
778695
97107
116
1234691215192429
571013172126313743
81114182227323844
1620253036424956
23283339455259
354148556371
4653606876
62707988
778695
97107
116