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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | 10 |
| 4 | 16 |
| 5 | 26 |
| 6 | 41 |
| 7 | 64 |
| 8 | 99 |
| 9 | 154 |
| 10 | 240 |
| 11 | 374 |
| 12 | 582 |
| 13 | 905 |
| 14 | 1408 |
| 15 | 2191 |
| 16 | 3410 |
| 17 | 5306 |
| 18 | 8256 |
| 19 | 12846 |
| 20 | 19989 |
| 21 | 31104 |
| 22 | 48399 |
| 23 | 75310 |
| 24 | 117184 |
| 25 | 182342 |
| 26 | 283730 |
| 27 | 441493 |
| 28 | 686976 |
| 29 | 1068955 |
| 30 | 1663326 |
| 31 | 2588186 |
| 32 | 4027296 |
| 33 | 6266594 |
| 34 | 9751009 |
| 35 | 15172864 |
| 36 | 23609435 |
| 37 | 36736994 |
| 38 | 57163872 |
| 39 | 88948710 |
| 40 | 138406878 |
| 41 | 215365281 |
| 42 | 335114880 |
| 43 | 521448871 |
[1,3,6,10,16,26,41,64,99,154,240,374,582,905,1408, 2191,3410,5306,8256,12846,19989,31104,48399,75310, 117184,182342,283730,441493,686976,1068955, 1663326,2588186,4027296,6266594,9751009,15172864, 23609435,36736994,57163872,88948710,138406878, 215365281,335114880,521448871] |