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A212011 as a triangular array

1
34
589
11161920
1526313435
314657626566
39708596101104105
71110141156167172175176
94165204235250261266269270
150244315354385400411416419420
196346

A212011 as a square array

135111531397194150196
4816264670110165244346
919315785141204315
20346296156235354
3565101167250385
66104172261400
105175266411
176269416
270419
420
135111531397194150196
4816264670110165244346
919315785141204315
20346296156235354
3565101167250385
66104172261400
105175266411
176269416
270419
420