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A155223 as a simple table

na(n)
31
44
510
645
7176
8869
95649
1044314
11456024
125472215
1382109824
141515983373
1534737855825
16992142189277

[1,4,10,45,176,869,5649,44314,456024,5472215,
 82109824,1515983373,34737855825,992142189277]