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A138495 as a simple table

na(n)
00
11
21
31
43
59
615
725
855
9121
10231
11441
12903
131849
143655
157225
1614535
1729241
1858311
19116281
20232903
21466489
22932295
231863225
243727815
257458361
2614913991
2729822521
2859650503
29119311929
30238612935
31477204025
32954429895
331908903481
343817763271
357635439161
3615270965703

[0,1,1,1,3,9,15,25,55,121,231,441,903,1849,3655,
 7225,14535,29241,58311,116281,232903,466489,
 932295,1863225,3727815,7458361,14913991,29822521,
 59650503,119311929,238612935,477204025,954429895,
 1908903481,3817763271,7635439161,15270965703]