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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 6 |
| 7 | 10 |
| 8 | 20 |
| 9 | 37 |
| 10 | 73 |
| 11 | 139 |
| 12 | 275 |
| 13 | 533 |
| 14 | 1059 |
| 15 | 2075 |
| 16 | 4126 |
| 17 | 8134 |
| 18 | 16194 |
| 19 | 32058 |
| 20 | 63910 |
| 21 | 126932 |
| 22 | 253252 |
| 23 | 503933 |
| 24 | 1006056 |
| 25 | 2004838 |
| 26 | 4004124 |
| 27 | 7987149 |
| 28 | 15957964 |
| 29 | 31854676 |
| 30 | 63660327 |
| 31 | 127141415 |
| 32 | 254136782 |
| 33 | 507750109 |
| 34 | 1015059238 |
| 35 | 2028564292 |
| 36 | 4055812657 |
| 37 | 8107052520 |
[1,1,1,2,3,6,10,20,37,73,139,275,533,1059,2075, 4126,8134,16194,32058,63910,126932,253252,503933, 1006056,2004838,4004124,7987149,15957964,31854676, 63660327,127141415,254136782,507750109,1015059238, 2028564292,4055812657,8107052520] |