| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 2 |
| 4 | 6 |
| 5 | 12 |
| 6 | 26 |
| 7 | 52 |
| 8 | 110 |
| 9 | 214 |
| 10 | 438 |
| 11 | 876 |
| 12 | 1762 |
| 13 | 3524 |
| 14 | 7084 |
| 15 | 14144 |
| 16 | 28360 |
| 17 | 56720 |
| 18 | 113542 |
| 19 | 227084 |
| 20 | 454448 |
| 21 | 908804 |
| 22 | 1818168 |
| 23 | 3636336 |
| 24 | 7273614 |
| 25 | 14547228 |
| 26 | 29096678 |
| 27 | 58192994 |
| 28 | 116390424 |
| 29 | 232780848 |
| 30 | 465569860 |
| 31 | 931139720 |
| 32 | 1862297158 |
| 33 | 3724592874 |
| 34 | 7449221168 |
| 35 | 14898442336 |
| 36 | 29796952652 |
| 37 | 59593905304 |
[0,2,2,6,12,26,52,110,214,438,876,1762,3524,7084, 14144,28360,56720,113542,227084,454448,908804, 1818168,3636336,7273614,14547228,29096678, 58192994,116390424,232780848,465569860,931139720, 1862297158,3724592874,7449221168,14898442336, 29796952652,59593905304] |