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A121460 as a triangular array

1
11
221
5431
139741
3422161151
895638271661
2331459465432271
610378239159108652981
1597988617398267173943791
418125851605101566544026713146101
109466766

A121460 as a square array

11251334892336101597418110946
1249225614537898825856766
1371638942396171605
141127651593981015
151643108267665
162265173440
172994267
1837131
1946
110
1
11251334892336101597418110946
1249225614537898825856766
1371638942396171605
141127651593981015
151643108267665
162265173440
172994267
1837131
1946
110
1