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A155755 as a triangular array

2
33
7107
25353525
121168142168121
72110647357351064721
5041805553993330539980555041
4032169299493712244922449493716929940321
362881663740509830223300109298223300509830663740362881

A155755 as a square array

23725121721504140321362881
310351681064805569299663740
735142735539949371509830
25168735333022449223300
1211064539922449109298
721805549371223300
504169299509830
40321663740
362881
23725121721504140321362881
310351681064805569299663740
735142735539949371509830
25168735333022449223300
1211064539922449109298
721805549371223300
504169299509830
40321663740
362881