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A001604 as a simple table

na(n)
011
131
2151
3911
45951
540051
6272611
71863551
812760031
987424711
10599129311
114106261531
1228144128251
13192901135711
141322159893351
159062207833151
1662113268013311
17425730597768451
182918000731816531
1920000274041790911
20137083916295800111
21939587136717207031
226440026032054760351

[11,31,151,911,5951,40051,272611,1863551,12760031,
 87424711,599129311,4106261531,28144128251,
 192901135711,1322159893351,9062207833151,
 62113268013311,425730597768451,2918000731816531,
 20000274041790911,137083916295800111,
 939587136717207031,6440026032054760351]