| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 8 |
| 5 | 16 |
| 6 | 32 |
| 7 | 64 |
| 8 | 127 |
| 9 | 253 |
| 10 | 504 |
| 11 | 1004 |
| 12 | 2000 |
| 13 | 3984 |
| 14 | 7936 |
| 15 | 15808 |
| 16 | 31489 |
| 17 | 62725 |
| 18 | 124946 |
| 19 | 248888 |
| 20 | 495776 |
| 21 | 987568 |
| 22 | 1967200 |
| 23 | 3918592 |
| 24 | 7805695 |
| 25 | 15548665 |
| 26 | 30972384 |
| 27 | 61695880 |
| 28 | 122895984 |
| 29 | 244804400 |
| 30 | 487641600 |
[1,1,2,4,8,16,32,64,127,253,504,1004,2000,3984, 7936,15808,31489,62725,124946,248888,495776, 987568,1967200,3918592,7805695,15548665,30972384, 61695880,122895984,244804400,487641600] |