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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 3 |
| 8 | 6 |
| 9 | 9 |
| 10 | 16 |
| 11 | 23 |
| 12 | 36 |
| 13 | 52 |
| 14 | 78 |
| 15 | 111 |
| 16 | 163 |
| 17 | 227 |
| 18 | 322 |
| 19 | 444 |
| 20 | 618 |
| 21 | 841 |
| 22 | 1151 |
| 23 | 1550 |
| 24 | 2094 |
| 25 | 2793 |
| 26 | 3730 |
| 27 | 4931 |
| 28 | 6522 |
| 29 | 8555 |
| 30 | 11216 |
| 31 | 14608 |
[0,0,0,0,1,1,2,3,6,9,16,23,36,52,78,111,163,227, 322,444,618,841,1151,1550,2094,2793,3730,4931, 6522,8555,11216,14608] |