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A051033 as a simple table

na(n)
01
11
21
33
44
55
615
721
828
984
10120
11165
12495
13715
141001
153003
164368
176188
1818564
1927132
2038760
21116280
22170544
23245157
24735471
251081575
261562275
274686825
286906900
2910015005
3030045015
3144352165
3264512240
33193536720
34286097760
35417225900
361251677700

[1,1,1,3,4,5,15,21,28,84,120,165,495,715,1001,
 3003,4368,6188,18564,27132,38760,116280,170544,
 245157,735471,1081575,1562275,4686825,6906900,
 10015005,30045015,44352165,64512240,193536720,
 286097760,417225900,1251677700]