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A173424 as a triangular array

1
11
313
153315
10515915105
9451054545105945
1039594531522531594510395
13513510395283515751575283510395135135
202702513513531185141751102514175311851351352027025
34459425

A173424 as a square array

1131510594510395135135202702534459425
1131510594510395135135
33945315283531185
151545225157514175
105105315157511025
945945283514175
103951039531185
135135135135
2027025
1131510594510395135135202702534459425
1131510594510395135135
33945315283531185
151545225157514175
105105315157511025
945945283514175
103951039531185
135135135135
2027025