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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 8 |
| 5 | 14 |
| 6 | 36 |
| 7 | 57 |
| 8 | 114 |
| 9 | 222 |
| 10 | 558 |
| 11 | 928 |
| 12 | 1856 |
| 13 | 3764 |
| 14 | 9384 |
| 15 | 15971 |
| 16 | 31942 |
| 17 | 66190 |
| 18 | 164322 |
| 19 | 283464 |
| 20 | 566928 |
| 21 | 1190628 |
| 22 | 2948184 |
| 23 | 5131002 |
| 24 | 10262004 |
| 25 | 21749532 |
| 26 | 53761068 |
| 27 | 94153056 |
| 28 | 188306112 |
| 29 | 401757672 |
| 30 | 991821456 |
| 31 | 1745117091 |
[1,1,3,4,8,14,36,57,114,222,558,928,1856,3764, 9384,15971,31942,66190,164322,283464,566928, 1190628,2948184,5131002,10262004,21749532, 53761068,94153056,188306112,401757672,991821456, 1745117091] |