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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 7 |
| 3 | 13 |
| 4 | 25 |
| 5 | 47 |
| 6 | 89 |
| 7 | 169 |
| 8 | 321 |
| 9 | 609 |
| 10 | 1155 |
| 11 | 2191 |
| 12 | 4157 |
| 13 | 7887 |
| 14 | 14963 |
| 15 | 28387 |
| 16 | 53855 |
| 17 | 102173 |
| 18 | 193841 |
| 19 | 367751 |
| 20 | 697689 |
| 21 | 1323641 |
| 22 | 2511185 |
| 23 | 4764169 |
| 24 | 9038483 |
| 25 | 17147623 |
| 26 | 32532117 |
| 27 | 61719263 |
| 28 | 117092515 |
| 29 | 222145507 |
| 30 | 421449879 |
| 31 | 799566029 |
| 32 | 1516920201 |
[3,7,13,25,47,89,169,321,609,1155,2191,4157,7887, 14963,28387,53855,102173,193841,367751,697689, 1323641,2511185,4764169,9038483,17147623,32532117, 61719263,117092515,222145507,421449879,799566029, 1516920201] |