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| n | a(n) |
|---|---|
| 0 | 7 |
| 1 | 15 |
| 2 | 32 |
| 3 | 68 |
| 4 | 145 |
| 5 | 309 |
| 6 | 658 |
| 7 | 1401 |
| 8 | 2983 |
| 9 | 6351 |
| 10 | 13522 |
| 11 | 28790 |
| 12 | 61297 |
| 13 | 130508 |
| 14 | 277866 |
| 15 | 591608 |
| 16 | 1259600 |
| 17 | 2681830 |
| 18 | 5709918 |
| 19 | 12157058 |
| 20 | 25883745 |
| 21 | 55109407 |
| 22 | 117334132 |
| 23 | 249817577 |
| 24 | 531889747 |
| 25 | 1132453154 |
| 26 | 2411120262 |
| 27 | 5133546494 |
| 28 | 10929898447 |
| 29 | 23270984338 |
| 30 | 49546545623 |
[7,15,32,68,145,309,658,1401,2983,6351,13522, 28790,61297,130508,277866,591608,1259600,2681830, 5709918,12157058,25883745,55109407,117334132, 249817577,531889747,1132453154,2411120262, 5133546494,10929898447,23270984338,49546545623] |