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A272644 as a triangular array

1
11
151
113131
12973291
161301301611
11251081206910811251
12533613115811158136132531
150911593577499540157749115935091
11021363012683816732616732612683813630110211

A272644 as a square array

1111111111
151329611252535091021
11373301108136131159336301
12930120691158157749268381
16110811158195401673261
1125361357749673261
125311593268381
150936301
11021
1
1111111111
151329611252535091021
11373301108136131159336301
12930120691158157749268381
16110811158195401673261
1125361357749673261
125311593268381
150936301
11021
1