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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 30 |
| 6 | 56 |
| 7 | 102 |
| 8 | 184 |
| 9 | 328 |
| 10 | 580 |
| 11 | 1018 |
| 12 | 1776 |
| 13 | 3082 |
| 14 | 5324 |
| 15 | 9160 |
| 16 | 15704 |
| 17 | 26838 |
| 18 | 45736 |
| 19 | 77742 |
| 20 | 131840 |
| 21 | 223112 |
| 22 | 376844 |
| 23 | 635378 |
| 24 | 1069536 |
| 25 | 1797650 |
| 26 | 3017236 |
| 27 | 5057672 |
| 28 | 8467744 |
| 29 | 14161038 |
| 30 | 23657240 |
| 31 | 39482358 |
| 32 | 65832136 |
| 33 | 109671112 |
| 34 | 182552404 |
| 35 | 303629290 |
[1,4,8,16,30,56,102,184,328,580,1018,1776,3082, 5324,9160,15704,26838,45736,77742,131840,223112, 376844,635378,1069536,1797650,3017236,5057672, 8467744,14161038,23657240,39482358,65832136, 109671112,182552404,303629290] |