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A051539 as a simple table

na(n)
01
15
245
3585
49945
569615
6348075
710094175
8111035925
94108329225
10168441498225
11168441498225
121179090487575
1362491795841475
141187344120988025
1572427991380269525
1672427991380269525
171665843801746199075
18121606597527472532475
19121606597527472532475

[1,5,45,585,9945,69615,348075,10094175,111035925,
 4108329225,168441498225,168441498225,
 1179090487575,62491795841475,1187344120988025,
 72427991380269525,72427991380269525,
 1665843801746199075,121606597527472532475,
 121606597527472532475]