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A278427 as a triangular array

1
11
211
3211
43311
545311
6576411
76998411
871112139511
981315181512511
109151823222113611
111017212829312416611

A278427 as a square array

11234567891011
112345678910
11357911131517
1136912151821
114813182328
1149152229
115122131
1151324
11616
116
11
1
11234567891011
112345678910
11357911131517
1136912151821
114813182328
1149152229
115122131
1151324
11616
116
11
1