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A338875 as a triangular array

1
11
311
13511
752511
541191292911
468376263149711
472935081415724967268772711
54583567493881115567440276624763111
7087261386237212093779093162737728769354061448111

A338875 as a square array

11313755414683472935458357087261
1152191765081674386237
1152926341579388121209
112914924967115567377909
11726874402731627
117276624737728769
11631354061
114481
11
1
11313755414683472935458357087261
1152191765081674386237
1152926341579388121209
112914924967115567377909
11726874402731627
117276624737728769
11631354061
114481
11
1