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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 2 |
| 4 | 4 |
| 5 | 4 |
| 6 | 10 |
| 7 | 10 |
| 8 | 26 |
| 9 | 22 |
| 10 | 56 |
| 11 | 68 |
| 12 | 118 |
| 13 | 126 |
| 14 | 284 |
| 15 | 274 |
| 16 | 542 |
| 17 | 604 |
| 18 | 1144 |
| 19 | 1196 |
| 20 | 2284 |
| 21 | 2340 |
| 22 | 4600 |
| 23 | 4876 |
| 24 | 9010 |
| 25 | 9280 |
| 26 | 18286 |
| 27 | 18476 |
| 28 | 35546 |
| 29 | 36886 |
| 30 | 70320 |
| 31 | 72092 |
| 32 | 140578 |
| 33 | 141736 |
| 34 | 276812 |
| 35 | 282694 |
| 36 | 548164 |
[0,2,2,4,4,10,10,26,22,56,68,118,126,284,274,542, 604,1144,1196,2284,2340,4600,4876,9010,9280,18286, 18476,35546,36886,70320,72092,140578,141736, 276812,282694,548164] |