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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 8 |
| 7 | 12 |
| 8 | 23 |
| 9 | 44 |
| 10 | 86 |
| 11 | 163 |
| 12 | 308 |
| 13 | 576 |
| 14 | 1074 |
| 15 | 1991 |
| 16 | 3680 |
| 17 | 6800 |
| 18 | 12626 |
| 19 | 23644 |
| 20 | 44751 |
| 21 | 85567 |
| 22 | 164941 |
| 23 | 319694 |
| 24 | 621671 |
| 25 | 1211197 |
| 26 | 2362808 |
| 27 | 4614173 |
| 28 | 9018299 |
| 29 | 17635055 |
| 30 | 34486330 |
| 31 | 67408501 |
| 32 | 131642673 |
| 33 | 256795173 |
| 34 | 500346954 |
| 35 | 973913365 |
| 36 | 1894371802 |
| 37 | 3683559071 |
[1,0,1,1,2,3,8,12,23,44,86,163,308,576,1074,1991, 3680,6800,12626,23644,44751,85567,164941,319694, 621671,1211197,2362808,4614173,9018299,17635055, 34486330,67408501,131642673,256795173,500346954, 973913365,1894371802,3683559071] |