The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 32 |
| 2 | 137 |
| 3 | 72 |
| 4 | 233 |
| 5 | 515 |
| 6 | 990 |
| 7 | 1798 |
| 8 | 4079 |
| 9 | 9026 |
| 10 | 18246 |
| 11 | 39612 |
| 12 | 86150 |
| 13 | 184768 |
| 14 | 396522 |
| 15 | 854978 |
| 16 | 1840676 |
| 17 | 3976611 |
| 18 | 8577126 |
| 19 | 18505102 |
| 20 | 40008385 |
| 21 | 86432218 |
| 22 | 186718489 |
| 23 | 403706444 |
| 24 | 872806433 |
| 25 | 1886931887 |
| 26 | 4080348203 |
| 27 | 8825031925 |
| 28 | 19084949119 |
[32,137,72,233,515,990,1798,4079,9026,18246,39612, 86150,184768,396522,854978,1840676,3976611, 8577126,18505102,40008385,86432218,186718489, 403706444,872806433,1886931887,4080348203, 8825031925,19084949119] |