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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 21 |
| 2 | 55 |
| 3 | 110 |
| 4 | 199 |
| 5 | 343 |
| 6 | 576 |
| 7 | 953 |
| 8 | 1563 |
| 9 | 2550 |
| 10 | 4147 |
| 11 | 6731 |
| 12 | 10912 |
| 13 | 17677 |
| 14 | 28623 |
| 15 | 46334 |
| 16 | 74991 |
| 17 | 121359 |
| 18 | 196384 |
| 19 | 317777 |
| 20 | 514195 |
| 21 | 832006 |
| 22 | 1346235 |
| 23 | 2178275 |
| 24 | 3524544 |
| 25 | 5702853 |
| 26 | 9227431 |
| 27 | 14930318 |
| 28 | 24157783 |
| 29 | 39088135 |
| 30 | 63245952 |
| 31 | 102334121 |
[0,21,55,110,199,343,576,953,1563,2550,4147,6731, 10912,17677,28623,46334,74991,121359,196384, 317777,514195,832006,1346235,2178275,3524544, 5702853,9227431,14930318,24157783,39088135, 63245952,102334121] |