The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 3 |
| 3 | 5 |
| 4 | 11 |
| 5 | 23 |
| 6 | 45 |
| 7 | 89 |
| 8 | 179 |
| 9 | 344 |
| 10 | 701 |
| 11 | 1366 |
| 12 | 2672 |
| 13 | 5290 |
| 14 | 10428 |
| 15 | 20400 |
| 16 | 40207 |
| 17 | 79206 |
| 18 | 155717 |
| 19 | 307072 |
| 20 | 606263 |
| 21 | 1194231 |
| 22 | 2361275 |
| 23 | 4668863 |
| 24 | 9228695 |
| 25 | 18290082 |
| 26 | 36249420 |
| 27 | 71861874 |
| 28 | 142662288 |
| 29 | 283409860 |
| 30 | 563270809 |
| 31 | 1120416558 |
| 32 | 2229577195 |
| 33 | 4438853135 |
| 34 | 8843117452 |
| 35 | 17624956422 |
| 36 | 35136263159 |
| 37 | 70081625113 |
| 38 | 139821120157 |
[0,0,3,5,11,23,45,89,179,344,701,1366,2672,5290, 10428,20400,40207,79206,155717,307072,606263, 1194231,2361275,4668863,9228695,18290082,36249420, 71861874,142662288,283409860,563270809,1120416558, 2229577195,4438853135,8843117452,17624956422, 35136263159,70081625113,139821120157] |