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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 7 |
| 3 | 17 |
| 4 | 40 |
| 5 | 92 |
| 6 | 208 |
| 7 | 464 |
| 8 | 1024 |
| 9 | 2240 |
| 10 | 4864 |
| 11 | 10496 |
| 12 | 22528 |
| 13 | 48128 |
| 14 | 102400 |
| 15 | 217088 |
| 16 | 458752 |
| 17 | 966656 |
| 18 | 2031616 |
| 19 | 4259840 |
| 20 | 8912896 |
| 21 | 18612224 |
| 22 | 38797312 |
| 23 | 80740352 |
| 24 | 167772160 |
| 25 | 348127232 |
| 26 | 721420288 |
| 27 | 1493172224 |
| 28 | 3087007744 |
| 29 | 6375342080 |
| 30 | 13153337344 |
| 31 | 27111981056 |
[1,3,7,17,40,92,208,464,1024,2240,4864,10496, 22528,48128,102400,217088,458752,966656,2031616, 4259840,8912896,18612224,38797312,80740352, 167772160,348127232,721420288,1493172224, 3087007744,6375342080,13153337344,27111981056] |