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A121724 as a simple table

na(n)
01
11
25
39
445
597
6485
71145
85725
914289
1071445
11185193
12925965
132467137
1412335685
1533563481
16167817405
17464221105
182321105525
196507351113
2032536755565
2192236247841
22461181239205
231319640776249
246598203881245
2519031570387857
2695157851939285

[1,1,5,9,45,97,485,1145,5725,14289,71445,185193,
 925965,2467137,12335685,33563481,167817405,
 464221105,2321105525,6507351113,32536755565,
 92236247841,461181239205,1319640776249,
 6598203881245,19031570387857,95157851939285]