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A107589 as a simple table

na(n)
01
11
22
35
415
552
6205
7921
84807
930288
10243338
112636799
1239930125
13851799936
1425433798924
151055317281976
1660604557533320
174808635126697325
18526853206940116357
1979701484897115170371
2016651360300285759198344

[1,1,2,5,15,52,205,921,4807,30288,243338,2636799,
 39930125,851799936,25433798924,1055317281976,
 60604557533320,4808635126697325,
 526853206940116357,79701484897115170371,
 16651360300285759198344]