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A109081 as a simple table

na(n)
11
21
33
410
537
6146
7602
82563
911181
1049720
11224540
121027038
134748042
1422150519
15104146733
16493012682
172347796965
1811239697816
1954061835288
20261130778516
211266125122956
226160158505040
2330065608532008
24147161532388934

[1,1,3,10,37,146,602,2563,11181,49720,224540,
 1027038,4748042,22150519,104146733,493012682,
 2347796965,11239697816,54061835288,261130778516,
 1266125122956,6160158505040,30065608532008,
 147161532388934]