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A193662 as a simple table

na(n)
02
11
25
37
425
551
6149
7351
8945
92347
106125
1115511
1240009
13102051
14262085
15670287
161718625
174399771
1811274269
1928873351

[2,1,5,7,25,51,149,351,945,2347,6125,15511,40009,
 102051,262085,670287,1718625,4399771,11274269,
 28873351]