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A203998 as a triangular array

1
33
555
7887
91111119
111415151411
13171919191713
1520232424232015
172327292929272317
19263134353534312619
2129353941414139352921
23323944

A203998 as a square array

1357911131517192123
3581114172023262932
581115192327313539
71115192429343944
9141924293541
111723293541
1320273441
15233139
172635
1929
21
1357911131517192123
3581114172023262932
581115192327313539
71115192429343944
9141924293541
111723293541
1320273441
15233139
172635
1929
21