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A086116 as a simple table

na(n)
11
21
33
43
515
615
735
835
9315
10315
11693
12693
133003
143003
156435
166435
17109395
18109395
19230945
20230945
21969969
22969969
232028117
242028117
2516900975
2616900975
2735102025
2835102025
29145422675
30145422675
31300540195
32300540195
339917826435

[1,1,3,3,15,15,35,35,315,315,693,693,3003,3003,
 6435,6435,109395,109395,230945,230945,969969,
 969969,2028117,2028117,16900975,16900975,35102025,
 35102025,145422675,145422675,300540195,300540195,
 9917826435]