The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 12 |
| 4 | 28 |
| 5 | 60 |
| 6 | 124 |
| 7 | 252 |
| 8 | 510 |
| 9 | 1032 |
| 10 | 2070 |
| 11 | 4146 |
| 12 | 8298 |
| 13 | 16602 |
| 14 | 33210 |
| 15 | 66426 |
| 16 | 132858 |
| 17 | 265722 |
| 18 | 531450 |
| 19 | 1062906 |
| 20 | 2125818 |
| 21 | 4251642 |
| 22 | 8503290 |
| 23 | 17006588 |
| 24 | 34013180 |
| 25 | 68026364 |
| 26 | 136052736 |
| 27 | 272105480 |
| 28 | 544210964 |
| 29 | 1088421932 |
| 30 | 2176843872 |
| 31 | 4353687750 |
| 32 | 8707375506 |
| 33 | 17414751018 |
| 34 | 34829502042 |
| 35 | 69659004090 |
[1,3,12,28,60,124,252,510,1032,2070,4146,8298, 16602,33210,66426,132858,265722,531450,1062906, 2125818,4251642,8503290,17006588,34013180, 68026364,136052736,272105480,544210964,1088421932, 2176843872,4353687750,8707375506,17414751018, 34829502042,69659004090] |