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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 6 |
| 6 | 12 |
| 7 | 23 |
| 8 | 44 |
| 9 | 85 |
| 10 | 164 |
| 11 | 316 |
| 12 | 609 |
| 13 | 1174 |
| 14 | 2263 |
| 15 | 4362 |
| 16 | 8408 |
| 17 | 16207 |
| 18 | 31240 |
| 19 | 60217 |
| 20 | 116072 |
| 21 | 223736 |
| 22 | 431265 |
| 23 | 831290 |
| 24 | 1602363 |
| 25 | 3088654 |
| 26 | 5953572 |
| 27 | 11475879 |
| 28 | 22120468 |
| 29 | 42638573 |
| 30 | 82188492 |
| 31 | 158423412 |
| 32 | 305370945 |
| 33 | 588621422 |
| 34 | 1134604271 |
| 35 | 2187020050 |
[0,0,1,2,3,6,12,23,44,85,164,316,609,1174,2263, 4362,8408,16207,31240,60217,116072,223736,431265, 831290,1602363,3088654,5953572,11475879,22120468, 42638573,82188492,158423412,305370945,588621422, 1134604271,2187020050] |