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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 0 |
| 5 | 2 |
| 6 | 4 |
| 7 | 2 |
| 8 | 12 |
| 9 | 18 |
| 10 | 24 |
| 11 | 82 |
| 12 | 120 |
| 13 | 242 |
| 14 | 620 |
| 15 | 1010 |
| 16 | 2324 |
| 17 | 5154 |
| 18 | 9520 |
| 19 | 22178 |
| 20 | 46512 |
| 21 | 94178 |
| 22 | 214548 |
| 23 | 446690 |
| 24 | 952732 |
| 25 | 2122034 |
| 26 | 4475592 |
| 27 | 9776626 |
| 28 | 21491496 |
| 29 | 46096338 |
| 30 | 101585276 |
| 31 | 222360530 |
| 32 | 483573796 |
| 33 | 1068438594 |
| 34 | 2341596256 |
| 35 | 5140674882 |
| 36 | 11369018464 |
[0,1,2,0,2,4,2,12,18,24,82,120,242,620,1010,2324, 5154,9520,22178,46512,94178,214548,446690,952732, 2122034,4475592,9776626,21491496,46096338, 101585276,222360530,483573796,1068438594, 2341596256,5140674882,11369018464] |