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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 3 |
| 6 | 7 |
| 7 | 8 |
| 8 | 15 |
| 9 | 20 |
| 10 | 33 |
| 11 | 47 |
| 12 | 75 |
| 13 | 110 |
| 14 | 172 |
| 15 | 259 |
| 16 | 401 |
| 17 | 612 |
| 18 | 947 |
| 19 | 1457 |
| 20 | 2258 |
| 21 | 3494 |
| 22 | 5428 |
| 23 | 8434 |
| 24 | 13138 |
| 25 | 20480 |
| 26 | 31982 |
| 27 | 49991 |
| 28 | 78244 |
| 29 | 122583 |
| 30 | 192255 |
| 31 | 301797 |
| 32 | 474190 |
| 33 | 745667 |
| 34 | 1173510 |
| 35 | 1848204 |
| 36 | 2912884 |
| 37 | 4593955 |
| 38 | 7249843 |
| 39 | 11448105 |
| 40 | 18087986 |
| 41 | 28594742 |
| 42 | 45228384 |
| 43 | 71573873 |
| 44 | 113320180 |
| 45 | 179498299 |
| 46 | 284449744 |
[0,1,1,3,3,7,8,15,20,33,47,75,110,172,259,401,612, 947,1457,2258,3494,5428,8434,13138,20480,31982, 49991,78244,122583,192255,301797,474190,745667, 1173510,1848204,2912884,4593955,7249843,11448105, 18087986,28594742,45228384,71573873,113320180, 179498299,284449744] |