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A231515 as a triangular array

2
22
464
714147
1235783512
21903433439021
3722515372594153722537
6556975051943519435750556965
114144135872158061256846158061358721441114
200364016888712755583691558

A231515 as a square array

224712213765114200
2614359022556914413640
414783431537750535872168887
7353432594194351580611275558
12901537194352568463691558
212257505158061
3756935872
651441
114
224712213765114200
2614359022556914413640
414783431537750535872168887
7353432594194351580611275558
12901537194352568463691558
212257505158061
3756935872
651441
114