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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 2 |
| 6 | 1 |
| 7 | 2 |
| 8 | 8 |
| 9 | 17 |
| 10 | 22 |
| 11 | 22 |
| 12 | 33 |
| 13 | 78 |
| 14 | 156 |
| 15 | 233 |
| 16 | 298 |
| 17 | 442 |
| 18 | 833 |
| 19 | 1546 |
| 20 | 2464 |
| 21 | 3553 |
| 22 | 5390 |
| 23 | 9230 |
| 24 | 16161 |
| 25 | 26358 |
| 26 | 40404 |
| 27 | 62713 |
| 28 | 103298 |
| 29 | 174290 |
| 30 | 285505 |
| 31 | 451154 |
| 32 | 712184 |
| 33 | 1156145 |
| 34 | 1910086 |
| 35 | 3122374 |
| 36 | 5005089 |
| 37 | 7987806 |
| 38 | 12907980 |
| 39 | 21090185 |
| 40 | 34362394 |
| 41 | 55428010 |
[0,0,0,1,2,2,1,2,8,17,22,22,33,78,156,233,298,442, 833,1546,2464,3553,5390,9230,16161,26358,40404, 62713,103298,174290,285505,451154,712184,1156145, 1910086,3122374,5005089,7987806,12907980,21090185, 34362394,55428010] |