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A306608 as a triangular array

1
22
232
3443
35453
456654
4667664
46788764
478989874
578910109875
5881010111010885
58101111121211111085

A306608 as a square array

122334444555
23455667788
24466788810
35678991011
35688101011
4679101112
46891012
4781011
47811
5810
58
5
122334444555
23455667788
24466788810
35678991011
35688101011
4679101112
46891012
4781011
47811
5810
58
5