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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 4 |
| 3 | 9 |
| 4 | 18 |
| 5 | 34 |
| 6 | 62 |
| 7 | 110 |
| 8 | 192 |
| 9 | 331 |
| 10 | 565 |
| 11 | 958 |
| 12 | 1615 |
| 13 | 2710 |
| 14 | 4531 |
| 15 | 7552 |
| 16 | 12554 |
| 17 | 20823 |
| 18 | 34472 |
| 19 | 56972 |
| 20 | 94020 |
| 21 | 154959 |
| 22 | 255102 |
| 23 | 419532 |
| 24 | 689312 |
| 25 | 1131632 |
| 26 | 1856382 |
| 27 | 3043208 |
| 28 | 4985674 |
| 29 | 8163321 |
| 30 | 13359207 |
| 31 | 21851594 |
| 32 | 35726470 |
| 33 | 58386958 |
| 34 | 95383471 |
| 35 | 155766277 |
| 36 | 254288786 |
[0,1,4,9,18,34,62,110,192,331,565,958,1615,2710, 4531,7552,12554,20823,34472,56972,94020,154959, 255102,419532,689312,1131632,1856382,3043208, 4985674,8163321,13359207,21851594,35726470, 58386958,95383471,155766277,254288786] |