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| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 2 |
| 5 | 7 |
| 6 | 15 |
| 7 | 36 |
| 8 | 80 |
| 9 | 174 |
| 10 | 371 |
| 11 | 787 |
| 12 | 1644 |
| 13 | 3410 |
| 14 | 7031 |
| 15 | 14423 |
| 16 | 29455 |
| 17 | 59948 |
| 18 | 121656 |
| 19 | 246302 |
| 20 | 497661 |
| 21 | 1003864 |
| 22 | 2022143 |
| 23 | 4068597 |
| 24 | 8178131 |
| 25 | 16425116 |
| 26 | 32965907 |
| 27 | 66125958 |
| 28 | 132577442 |
| 29 | 265700195 |
| 30 | 532313023 |
| 31 | 1066152092 |
[1,2,7,15,36,80,174,371,787,1644,3410,7031,14423, 29455,59948,121656,246302,497661,1003864,2022143, 4068597,8178131,16425116,32965907,66125958, 132577442,265700195,532313023,1066152092] |