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A345254 as a triangular array

1
23
456
89107
1617181112
323334192013
64656635362114
1281291306768372215
25625725813113269382324
51251351425926013370394025
102410251026515516261134

A345254 as a square array

12481632641282565121024
3591733651292575131025
6101834661302585141026
711193567131259515
12203668132260516
13213769133261
14223870134
152339
2440
25
12481632641282565121024
3591733651292575131025
6101834661302585141026
711193567131259515
12203668132260516
13213769133261
14223870134
152339
2440
25