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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 2 |
| 5 | 4 |
| 6 | 8 |
| 7 | 16 |
| 8 | 34 |
| 9 | 68 |
| 10 | 134 |
| 11 | 260 |
| 12 | 502 |
| 13 | 960 |
| 14 | 1824 |
| 15 | 3444 |
| 16 | 6472 |
| 17 | 12108 |
| 18 | 22566 |
| 19 | 41912 |
| 20 | 77608 |
| 21 | 143312 |
| 22 | 263990 |
| 23 | 485196 |
| 24 | 889938 |
| 25 | 1629256 |
| 26 | 2977642 |
| 27 | 5433344 |
| 28 | 9899776 |
| 29 | 18013288 |
| 30 | 32734928 |
| 31 | 59417944 |
| 32 | 107732106 |
| 33 | 195130092 |
| 34 | 353087560 |
| 35 | 638329168 |
| 36 | 1153012298 |
[0,0,0,0,2,4,8,16,34,68,134,260,502,960,1824,3444, 6472,12108,22566,41912,77608,143312,263990,485196, 889938,1629256,2977642,5433344,9899776,18013288, 32734928,59417944,107732106,195130092,353087560, 638329168,1153012298] |