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A113860 as a simple table

na(n)
01
13
27
323
487
5599
61623
73671
87767
915959
1081495
11343639
12867927
131916503
1418693719
15152911447
16421346903
17958217815
182031959639
194179443287
2012769377879
211112281005655
229908374027863
2327500560072279
2497869304249943

[1,3,7,23,87,599,1623,3671,7767,15959,81495,
 343639,867927,1916503,18693719,152911447,
 421346903,958217815,2031959639,4179443287,
 12769377879,1112281005655,9908374027863,
 27500560072279,97869304249943]