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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 2 |
| 3 | 2 |
| 4 | 4 |
| 5 | 16 |
| 6 | 12 |
| 7 | 72 |
| 8 | 88 |
| 9 | 264 |
| 10 | 608 |
| 11 | 1056 |
| 12 | 3280 |
| 13 | 5504 |
| 14 | 15328 |
| 15 | 31904 |
| 16 | 71104 |
| 17 | 175488 |
| 18 | 358080 |
| 19 | 900736 |
| 20 | 1925248 |
| 21 | 4518016 |
| 22 | 10404864 |
| 23 | 23138304 |
| 24 | 54970624 |
| 25 | 122038272 |
| 26 | 286077440 |
| 27 | 651510272 |
| 28 | 1492685824 |
| 29 | 3465687040 |
| 30 | 7876488192 |
| 31 | 18322630656 |
| 32 | 41904609280 |
| 33 | 96788580352 |
| 34 | 223335882752 |
[1,0,2,2,4,16,12,72,88,264,608,1056,3280,5504, 15328,31904,71104,175488,358080,900736,1925248, 4518016,10404864,23138304,54970624,122038272, 286077440,651510272,1492685824,3465687040, 7876488192,18322630656,41904609280,96788580352, 223335882752] |