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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 6 |
| 5 | 7 |
| 6 | 9 |
| 7 | 10 |
| 8 | 17 |
| 9 | 22 |
| 10 | 29 |
| 11 | 41 |
| 12 | 64 |
| 13 | 108 |
| 14 | 188 |
| 15 | 325 |
| 16 | 547 |
| 17 | 890 |
| 18 | 1399 |
| 19 | 2129 |
| 20 | 3147 |
| 21 | 4543 |
| 22 | 6486 |
| 23 | 9445 |
| 24 | 14905 |
| 25 | 27370 |
| 26 | 59369 |
| 27 | 142897 |
| 28 | 353726 |
| 29 | 860026 |
| 30 | 2014744 |
| 31 | 4523565 |
| 32 | 9738843 |
| 33 | 20157022 |
| 34 | 40235827 |
| 35 | 77701770 |
| 36 | 145593150 |
| 37 | 265384904 |
[0,1,3,4,6,7,9,10,17,22,29,41,64,108,188,325,547, 890,1399,2129,3147,4543,6486,9445,14905,27370, 59369,142897,353726,860026,2014744,4523565, 9738843,20157022,40235827,77701770,145593150, 265384904] |