The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 14 |
| 5 | 26 |
| 6 | 50 |
| 7 | 96 |
| 8 | 184 |
| 9 | 352 |
| 10 | 678 |
| 11 | 1310 |
| 12 | 2534 |
| 13 | 4908 |
| 14 | 9520 |
| 15 | 18496 |
| 16 | 35980 |
| 17 | 70068 |
| 18 | 136596 |
| 19 | 266560 |
| 20 | 520672 |
| 21 | 1017920 |
| 22 | 1991686 |
| 23 | 3900022 |
| 24 | 7642470 |
| 25 | 14986604 |
| 26 | 29407560 |
| 27 | 57741232 |
| 28 | 113441092 |
| 29 | 222996908 |
| 30 | 438590236 |
| 31 | 863056256 |
| 32 | 1699136816 |
| 33 | 3346697088 |
[1,2,4,8,14,26,50,96,184,352,678,1310,2534,4908, 9520,18496,35980,70068,136596,266560,520672, 1017920,1991686,3900022,7642470,14986604,29407560, 57741232,113441092,222996908,438590236,863056256, 1699136816,3346697088] |