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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 8 |
| 3 | 0 |
| 4 | 13 |
| 5 | 24 |
| 6 | 41 |
| 7 | 39 |
| 8 | 109 |
| 9 | 216 |
| 10 | 471 |
| 11 | 883 |
| 12 | 1826 |
| 13 | 3771 |
| 14 | 7957 |
| 15 | 16180 |
| 16 | 33265 |
| 17 | 68409 |
| 18 | 141908 |
| 19 | 292327 |
| 20 | 602447 |
| 21 | 1240608 |
| 22 | 2561035 |
| 23 | 5282041 |
| 24 | 10893334 |
| 25 | 22455433 |
| 26 | 46313241 |
| 27 | 95513864 |
| 28 | 196987195 |
| 29 | 406204281 |
| 30 | 837692722 |
| 31 | 1727540167 |
| 32 | 3562722575 |
| 33 | 7347181938 |
[0,8,0,13,24,41,39,109,216,471,883,1826,3771,7957, 16180,33265,68409,141908,292327,602447,1240608, 2561035,5282041,10893334,22455433,46313241, 95513864,196987195,406204281,837692722,1727540167, 3562722575,7347181938] |