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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 11 |
| 5 | 28 |
| 6 | 69 |
| 7 | 153 |
| 8 | 323 |
| 9 | 647 |
| 10 | 1258 |
| 11 | 2380 |
| 12 | 4427 |
| 13 | 8092 |
| 14 | 14601 |
| 15 | 25991 |
| 16 | 45724 |
| 17 | 79469 |
| 18 | 136604 |
| 19 | 232235 |
| 20 | 390806 |
| 21 | 651132 |
| 22 | 1074863 |
| 23 | 1758595 |
| 24 | 2853386 |
| 25 | 4592952 |
| 26 | 7337821 |
| 27 | 11639376 |
| 28 | 18337780 |
| 29 | 28704122 |
| 30 | 44653849 |
| 31 | 69055688 |
| 32 | 106188925 |
| 33 | 162402533 |
[1,2,4,11,28,69,153,323,647,1258,2380,4427,8092, 14601,25991,45724,79469,136604,232235,390806, 651132,1074863,1758595,2853386,4592952,7337821, 11639376,18337780,28704122,44653849,69055688, 106188925,162402533] |