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A123315 as a triangular array

1
33
8108
912129
41519154
7151919157
818192119188
92220111120229
4151715181517154
715181820201818157
81820222111212220188
9222117191818191721229

A123315 as a square array

138947894789
310121515182215151822
8121919192017182021
91519211115182217
415191118202119
7182015201118
82217182118
915182219
4152017
71821
822
9
138947894789
310121515182215151822
8121919192017182021
91519211115182217
415191118202119
7182015201118
82217182118
915182219
4152017
71821
822
9