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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 7 |
| 4 | 13 |
| 5 | 24 |
| 6 | 43 |
| 7 | 77 |
| 8 | 137 |
| 9 | 241 |
| 10 | 421 |
| 11 | 732 |
| 12 | 1266 |
| 13 | 2178 |
| 14 | 3733 |
| 15 | 6376 |
| 16 | 10858 |
| 17 | 18439 |
| 18 | 31237 |
| 19 | 52804 |
| 20 | 89082 |
| 21 | 150014 |
| 22 | 252206 |
| 23 | 423367 |
| 24 | 709697 |
| 25 | 1188136 |
| 26 | 1986730 |
| 27 | 3318386 |
| 28 | 5536857 |
| 29 | 9229483 |
| 30 | 15370775 |
| 31 | 25576584 |
| 32 | 42524547 |
| 33 | 70649205 |
| 34 | 117290710 |
[1,1,4,7,13,24,43,77,137,241,421,732,1266,2178, 3733,6376,10858,18439,31237,52804,89082,150014, 252206,423367,709697,1188136,1986730,3318386, 5536857,9229483,15370775,25576584,42524547, 70649205,117290710] |