The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 3 |
| 3 | 7 |
| 4 | 10 |
| 5 | 27 |
| 6 | 45 |
| 7 | 98 |
| 8 | 193 |
| 9 | 379 |
| 10 | 778 |
| 11 | 1523 |
| 12 | 3085 |
| 13 | 6138 |
| 14 | 12281 |
| 15 | 24603 |
| 16 | 49106 |
| 17 | 98363 |
| 18 | 196557 |
| 19 | 393234 |
| 20 | 786481 |
| 21 | 1572731 |
| 22 | 3145946 |
| 23 | 6291203 |
| 24 | 12583117 |
| 25 | 25165802 |
| 26 | 50331369 |
| 27 | 100663963 |
| 28 | 201325602 |
| 29 | 402654283 |
| 30 | 805305613 |
| 31 | 1610612610 |
| 32 | 3221227041 |
[0,3,7,10,27,45,98,193,379,778,1523,3085,6138, 12281,24603,49106,98363,196557,393234,786481, 1572731,3145946,6291203,12583117,25165802, 50331369,100663963,201325602,402654283,805305613, 1610612610,3221227041] |