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A007950号作为一个简单的表

n个a(n)
11
2
5
49
511
613
717
821
925
1027
1129
1233
1335
1437
1543
1649
1751
1853
1957
2059
2165
2267
2369
2473
2575
2677
2781
2885
2989
3091
3197
32101
33107
34109
35113
36115
37117
38121
39123
40129
41131
42133
43137
44139
45145
46149
47153
48155
49157
50161
51163
52165
53171
54173
55177
56179
57181
58185
59187
60195
61197

[1,3,5,9,11,13,17,21,25,27,29,33,35,37,43,49,51,53,57,59,65,67,69,73,75,77,81,85,89,91,97,101,107,109,113,115,117,121,123,129,131,133,137,139,145,149,153,155,157,161,163,165,171,173,177,179,181,185,187,195,197]