The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 10 |
| 4 | 17 |
| 5 | 30 |
| 6 | 47 |
| 7 | 66 |
| 8 | 97 |
| 9 | 158 |
| 10 | 247 |
| 11 | 354 |
| 12 | 481 |
| 13 | 1002 |
| 14 | 1609 |
| 15 | 2888 |
| 16 | 5091 |
| 17 | 7372 |
| 18 | 10589 |
| 19 | 14842 |
| 20 | 19265 |
| 21 | 28954 |
| 22 | 38895 |
| 23 | 50108 |
| 24 | 70045 |
| 25 | 91746 |
| 26 | 114955 |
| 27 | 159452 |
| 28 | 245695 |
| 29 | 356198 |
| 30 | 488247 |
| 31 | 704338 |
| 32 | 1461177 |
| 33 | 2320610 |
| 34 | 3578397 |
| 35 | 4976666 |
| 36 | 7952887 |
| 37 | 10974264 |
| 38 | 17946857 |
| 39 | 31413774 |
| 40 | 52409785 |
| 41 | 76446368 |
| 42 | 102411319 |
| 43 | 132813776 |
| 44 | 165396433 |
| 45 | 202553100 |
| 46 | 245196901 |
| 47 | 288309510 |
[2,5,10,17,30,47,66,97,158,247,354,481,1002,1609, 2888,5091,7372,10589,14842,19265,28954,38895, 50108,70045,91746,114955,159452,245695,356198, 488247,704338,1461177,2320610,3578397,4976666, 7952887,10974264,17946857,31413774,52409785, 76446368,102411319,132813776,165396433,202553100, 245196901,288309510] |