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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 11 |
| 4 | 26 |
| 5 | 65 |
| 6 | 150 |
| 7 | 343 |
| 8 | 760 |
| 9 | 1670 |
| 10 | 3574 |
| 11 | 7561 |
| 12 | 15752 |
| 13 | 32396 |
| 14 | 65850 |
| 15 | 132386 |
| 16 | 263447 |
| 17 | 519316 |
| 18 | 1014744 |
| 19 | 1966234 |
| 20 | 3780464 |
| 21 | 7215020 |
| 22 | 13674227 |
| 23 | 25744768 |
| 24 | 48166429 |
| 25 | 89576421 |
| 26 | 165638008 |
| 27 | 304615115 |
| 28 | 557275053 |
| 29 | 1014398476 |
| 30 | 1837617957 |
| 31 | 3313527482 |
| 32 | 5948262037 |
| 33 | 10632231253 |
| 34 | 18926026208 |
[1,1,4,11,26,65,150,343,760,1670,3574,7561,15752, 32396,65850,132386,263447,519316,1014744,1966234, 3780464,7215020,13674227,25744768,48166429, 89576421,165638008,304615115,557275053,1014398476, 1837617957,3313527482,5948262037,10632231253, 18926026208] |