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A174909 as a simple table

na(n)
11
21
33
42
55
615
78
814
935
10105
1148
1288
13154
14385
151155
16480
17624
181144
192002
205005
2115015
225760
238160
2410608
2519448
2634034
2785085
28255255
2992160
30109440
31155040
32201552
33369512
34646646
351616615
364849845
371658880
382119680
392517120
403565920

[1,1,3,2,5,15,8,14,35,105,48,88,154,385,1155,480,
 624,1144,2002,5005,15015,5760,8160,10608,19448,
 34034,85085,255255,92160,109440,155040,201552,
 369512,646646,1616615,4849845,1658880,2119680,
 2517120,3565920]