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A033876 as a simple table

na(n)
03
115
270
3315
41386
56006
625740
7109395
8461890
91939938
108112468
1133801950
12140408100
13581690700
142404321560
159917826435
1640838108850
17167890003050
18689232644100
192825853840810
2011572544300460
2147342226683700
22193485622098600
23790066290235950
243223470464162676

[3,15,70,315,1386,6006,25740,109395,461890,
 1939938,8112468,33801950,140408100,581690700,
 2404321560,9917826435,40838108850,167890003050,
 689232644100,2825853840810,11572544300460,
 47342226683700,193485622098600,790066290235950,
 3223470464162676]