The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 10 |
| 4 | 28 |
| 5 | 50 |
| 6 | 116 |
| 7 | 178 |
| 8 | 528 |
| 9 | 1282 |
| 10 | 2794 |
| 11 | 4778 |
| 12 | 10594 |
| 13 | 17166 |
| 14 | 33426 |
| 15 | 60242 |
| 16 | 183072 |
| 17 | 304202 |
| 18 | 759716 |
| 19 | 1288642 |
| 20 | 2965286 |
| 21 | 6352098 |
| 22 | 11776586 |
| 23 | 18326642 |
| 24 | 48714362 |
| 25 | 95769336 |
| 26 | 172377654 |
| 27 | 417138342 |
| 28 | 1004225842 |
| 29 | 1633822142 |
| 30 | 3266821106 |
| 31 | 4706920002 |
| 32 | 16520601024 |
[1,2,5,10,28,50,116,178,528,1282,2794,4778,10594, 17166,33426,60242,183072,304202,759716,1288642, 2965286,6352098,11776586,18326642,48714362, 95769336,172377654,417138342,1004225842, 1633822142,3266821106,4706920002,16520601024] |