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A084625 as a simple table

na(n)
01
13
28
321
455
5143
6366
7919
82265
95491
1013125
1131000
1272485
13168042
14386709
15884161
162009742
174543830
1810222264
1922891099
2051041560
21113359224
22250839510
23553173006
241216070081
252665518207
265826533103
2712703217438
2827628250142

[1,3,8,21,55,143,366,919,2265,5491,13125,31000,
 72485,168042,386709,884161,2009742,4543830,
 10222264,22891099,51041560,113359224,250839510,
 553173006,1216070081,2665518207,5826533103,
 12703217438,27628250142]