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A143998 as a triangular array

0
11
232
3443
36663
479974
5911121195
61013151513106
6121518181815126
713182122222118137
81520242627262420158
9162227303131302722169
9182430

A143998 as a square array

0123345667899
134679101213151618
246911131518202224
36912151821242730
37111518222630
491318222731
51015212631
612182430
6132027
71522
816
9
0123345667899
134679101213151618
246911131518202224
36912151821242730
37111518222630
491318222731
51015212631
612182430
6132027
71522
816
9