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A009211 as a simple table

na(n)
01
11
21
33
49
517
657
7259
8497
9961
109169
11-8349
12-299079
13-420847
14-7650615
15-107714525
16-160774303
17-291144191
18-24228427487
1971679177795
201725345708777
21-2546217250159
2279802910103257
231636072819714243
24-2815860329426863

[1,1,1,3,9,17,57,259,497,961,9169,-8349,-299079,
 -420847,-7650615,-107714525,-160774303,-291144191,
 -24228427487,71679177795,1725345708777,
 -2546217250159,79802910103257,1636072819714243,
 -2815860329426863]