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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 9 |
| 5 | 18 |
| 6 | 37 |
| 7 | 74 |
| 8 | 148 |
| 9 | 296 |
| 10 | 591 |
| 11 | 1182 |
| 12 | 2365 |
| 13 | 4730 |
| 14 | 9459 |
| 15 | 18919 |
| 16 | 37837 |
| 17 | 75674 |
| 18 | 151349 |
| 19 | 302698 |
| 20 | 605396 |
| 21 | 1210791 |
| 22 | 2421583 |
| 23 | 4843165 |
| 24 | 9686330 |
| 25 | 19372660 |
| 26 | 38745321 |
| 27 | 77490641 |
| 28 | 154981283 |
| 29 | 309962566 |
| 30 | 619925131 |
| 31 | 1239850262 |
| 32 | 2479700525 |
| 33 | 4959401049 |
| 34 | 9918802098 |
[1,1,2,5,9,18,37,74,148,296,591,1182,2365,4730, 9459,18919,37837,75674,151349,302698,605396, 1210791,2421583,4843165,9686330,19372660,38745321, 77490641,154981283,309962566,619925131,1239850262, 2479700525,4959401049,9918802098] |