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A229707 as a triangular array

1
01
021
0121
00321
004321
0036321
00276321
001896321
000101296321
0008161496321
000720201496321

A229707 as a square array

100000000000
12100000000
1234321000
1236781087
12369121620
123691420
1236914
12369
1236
123
12
1
100000000000
12100000000
1234321000
1236781087
12369121620
123691420
1236914
12369
1236
123
12
1