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A181948 as a triangular array

2
23
234
2445
24556
246667
2467778
24688889
2468999910
2479101010101011
247910111111111112
25791112121212121213
2579121213131313131314

A181948 as a square array

2222222222222
334444444455
44566667777
5567889999
6678910101112
778910111212
88910111213
9910111213
1010111213
11111213
121213
1313
14
2222222222222
334444444455
44566667777
5567889999
6678910101112
778910111212
88910111213
9910111213
1010111213
11111213
121213
1313
14