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A047042 as a simple table

na(n)
01
11
22
35
414
556
6202
7715
82529
99701
1036797
11138564
12520062
131999679
147700373
1529612097
16113722740
17440354696
181709283358
196637835682
2025773923006
21100398993203
22391785231463
231530125311638
245978033636691
2523390474605783

[1,1,2,5,14,56,202,715,2529,9701,36797,138564,
 520062,1999679,7700373,29612097,113722740,
 440354696,1709283358,6637835682,25773923006,
 100398993203,391785231463,1530125311638,
 5978033636691,23390474605783]