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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 3 |
| 9 | 2 |
| 10 | 7 |
| 11 | 7 |
| 12 | 16 |
| 13 | 26 |
| 14 | 41 |
| 15 | 92 |
| 16 | 128 |
| 17 | 317 |
| 18 | 478 |
| 19 | 1107 |
| 20 | 1977 |
| 21 | 4077 |
| 22 | 8547 |
| 23 | 16310 |
| 24 | 37775 |
| 25 | 71489 |
| 26 | 170660 |
| 27 | 339138 |
| 28 | 795833 |
| 29 | 1705058 |
| 30 | 3876254 |
| 31 | 8926023 |
| 32 | 19888522 |
| 33 | 48187837 |
| 34 | 107726407 |
| 35 | 267597455 |
| 36 | 613509355 |
| 37 | 1531527270 |
| 38 | 3646775589 |
| 39 | 9066267823 |
[1,0,0,1,0,1,1,1,3,2,7,7,16,26,41,92,128,317,478, 1107,1977,4077,8547,16310,37775,71489,170660, 339138,795833,1705058,3876254,8926023,19888522, 48187837,107726407,267597455,613509355,1531527270, 3646775589,9066267823] |