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A371519 as a simple table

na(n)
01
15
245
3470
45375
565231
6825225
710764185
8143739440
91955340360
1027001732972
11377530388235
125333865386885
1376031188364860
141092117166466660
1515792298241897649
16229704197116753825
173358528175751886765
1849333470827844265285
19727680248026484478405

[1,5,45,470,5375,65231,825225,10764185,143739440,
 1955340360,27001732972,377530388235,5333865386885,
 76031188364860,1092117166466660,15792298241897649,
 229704197116753825,3358528175751886765,
 49333470827844265285,727680248026484478405]