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A111734 as a simple table

na(n)
1-1
21
3-1
43
5-6
610
7-15
823
9-37
1061
11-100
12162
13-261
14421
15-681
161103
17-1786
182890
19-4675
207563
21-12237
2219801
23-32040
2451842
25-83881
26135721
27-219601
28355323
29-574926
30930250
31-1505175
322435423
33-3940597
346376021
35-10316620
3616692642
37-27009261
3843701901
39-70711161
40114413063

[-1,1,-1,3,-6,10,-15,23,-37,61,-100,162,-261,421,
 -681,1103,-1786,2890,-4675,7563,-12237,19801,
 -32040,51842,-83881,135721,-219601,355323,-574926,
 930250,-1505175,2435423,-3940597,6376021,
 -10316620,16692642,-27009261,43701901,-70711161,
 114413063]