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A006131 as a simple table

na(n)
01
11
25
39
429
565
6181
7441
81165
92929
107589
1119305
1249661
13126881
14325525
15833049
162135149
175467345
1814007941
1935877321
2091909085
21235418369
22603054709
231544728185
243956947021
2510135859761
2625963647845
2766507086889
28170361678269

[1,1,5,9,29,65,181,441,1165,2929,7589,19305,49661,
 126881,325525,833049,2135149,5467345,14007941,
 35877321,91909085,235418369,603054709,1544728185,
 3956947021,10135859761,25963647845,66507086889,
 170361678269]