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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 2 |
| 3 | 2 |
| 4 | 2 |
| 5 | 10 |
| 6 | 18 |
| 7 | 26 |
| 8 | 66 |
| 9 | 138 |
| 10 | 242 |
| 11 | 506 |
| 12 | 1058 |
| 13 | 2026 |
| 14 | 4050 |
| 15 | 8282 |
| 16 | 16386 |
| 17 | 32586 |
| 18 | 65714 |
| 19 | 131258 |
| 20 | 261602 |
| 21 | 524458 |
| 22 | 1049490 |
| 23 | 2095898 |
| 24 | 4193730 |
| 25 | 8391690 |
| 26 | 16775282 |
| 27 | 33550202 |
| 28 | 67116962 |
| 29 | 134218090 |
| 30 | 268418898 |
| 31 | 536886746 |
| 32 | 1073759106 |
| 33 | 2147434698 |
| 34 | 4294981682 |
| 35 | 8590018106 |
[0,0,2,2,2,10,18,26,66,138,242,506,1058,2026,4050, 8282,16386,32586,65714,131258,261602,524458, 1049490,2095898,4193730,8391690,16775282,33550202, 67116962,134218090,268418898,536886746,1073759106, 2147434698,4294981682,8590018106] |