The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 8 |
| 5 | 17 |
| 6 | 38 |
| 7 | 86 |
| 8 | 192 |
| 9 | 419 |
| 10 | 894 |
| 11 | 1872 |
| 12 | 3864 |
| 13 | 7893 |
| 14 | 16006 |
| 15 | 32298 |
| 16 | 64960 |
| 17 | 130375 |
| 18 | 261310 |
| 19 | 523300 |
| 20 | 1047416 |
| 21 | 2095801 |
| 22 | 4192742 |
| 23 | 8386814 |
| 24 | 16775168 |
| 25 | 33552107 |
| 26 | 67106238 |
| 27 | 134214776 |
| 28 | 268432152 |
| 29 | 536867229 |
| 30 | 1073737734 |
| 31 | 2147479122 |
| 32 | 4294962304 |
| 33 | 8589929103 |
| 34 | 17179863166 |
[1,1,2,4,8,17,38,86,192,419,894,1872,3864,7893, 16006,32298,64960,130375,261310,523300,1047416, 2095801,4192742,8386814,16775168,33552107, 67106238,134214776,268432152,536867229,1073737734, 2147479122,4294962304,8589929103,17179863166] |