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A134841 as a triangular array

1
23
334
4647
55556
6989612
7777778
812814812815
991299129913
10151015121510151018

A134841 as a square array

12345678910
33659712915
4458781210
759714915
6678912
127121215
88910
15915
1310
18
12345678910
33659712915
4458781210
759714915
6678912
127121215
88910
15915
1310
18