The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 10 |
| 3 | 32 |
| 4 | 80 |
| 5 | 162 |
| 6 | 493 |
| 7 | 1109 |
| 8 | 2656 |
| 9 | 7235 |
| 10 | 16492 |
| 11 | 41839 |
| 12 | 106203 |
| 13 | 251488 |
| 14 | 640167 |
| 15 | 1579481 |
| 16 | 3845121 |
| 17 | 9681356 |
| 18 | 23735901 |
| 19 | 58568055 |
| 20 | 145990039 |
| 21 | 358605440 |
| 22 | 888720845 |
| 23 | 2202562818 |
| 24 | 5427876319 |
| 25 | 13455220186 |
| 26 | 33269176662 |
| 27 | 82172839773 |
| 28 | 203518046217 |
[5,10,32,80,162,493,1109,2656,7235,16492,41839, 106203,251488,640167,1579481,3845121,9681356, 23735901,58568055,145990039,358605440,888720845, 2202562818,5427876319,13455220186,33269176662, 82172839773,203518046217] |