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| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 39 |
| 3 | 111 |
| 4 | 183 |
| 5 | 255 |
| 6 | 327 |
| 7 | 363 |
| 8 | 471 |
| 9 | 2199 |
| 10 | 3063 |
| 11 | 4359 |
| 12 | 4375 |
| 13 | 5571 |
| 14 | 8751 |
| 15 | 15723 |
| 16 | 36759 |
| 17 | 46791 |
| 18 | 65535 |
| 19 | 140103 |
| 20 | 208191 |
| 21 | 441027 |
| 22 | 4190263 |
| 23 | 9056583 |
| 24 | 57395631 |
| 25 | 172186887 |
| 26 | 236923383 |
| 27 | 918330183 |
| 28 | 3932935775 |
| 29 | 4294967295 |
| 30 | 4764161215 |
[15,39,111,183,255,327,363,471,2199,3063,4359, 4375,5571,8751,15723,36759,46791,65535,140103, 208191,441027,4190263,9056583,57395631,172186887, 236923383,918330183,3932935775,4294967295, 4764161215] |