The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 539 |
| 2 | 1513 |
| 3 | 3461 |
| 4 | 7307 |
| 5 | 14767 |
| 6 | 28844 |
| 7 | 54543 |
| 8 | 99872 |
| 9 | 177207 |
| 10 | 305112 |
| 11 | 510719 |
| 12 | 832788 |
| 13 | 1325583 |
| 14 | 2063717 |
| 15 | 3148137 |
| 16 | 4713439 |
| 17 | 6936723 |
| 18 | 10048219 |
| 19 | 14343937 |
| 20 | 20200617 |
| 21 | 28093279 |
| 22 | 38615698 |
| 23 | 52504155 |
| 24 | 70664842 |
| 25 | 94205327 |
| 26 | 124470514 |
| 27 | 163083563 |
[539,1513,3461,7307,14767,28844,54543,99872, 177207,305112,510719,832788,1325583,2063717, 3148137,4713439,6936723,10048219,14343937, 20200617,28093279,38615698,52504155,70664842, 94205327,124470514,163083563] |