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A185998 as a simple table

na(n)
01
11
22
35
416
564
6308
71727
811008
978244
10611060
115184338
1247366320
13462782080
144807659368
1552853722811
16612426360832
177453621425532
1894997205901940
191264555335831662
2017540102647480336
21252979919852470672
223786896497867089656
2358733519954606892278
24942372338052077455168

[1,1,2,5,16,64,308,1727,11008,78244,611060,
 5184338,47366320,462782080,4807659368,52853722811,
 612426360832,7453621425532,94997205901940,
 1264555335831662,17540102647480336,
 252979919852470672,3786896497867089656,
 58733519954606892278,942372338052077455168]