The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 5 |
| 1 | 13 |
| 2 | 37 |
| 3 | 109 |
| 4 | 313 |
| 5 | 905 |
| 6 | 2617 |
| 7 | 7561 |
| 8 | 21853 |
| 9 | 63157 |
| 10 | 182525 |
| 11 | 527509 |
| 12 | 1524529 |
| 13 | 4405969 |
| 14 | 12733489 |
| 15 | 36800465 |
| 16 | 106355317 |
| 17 | 307372573 |
| 18 | 888323221 |
| 19 | 2567301757 |
| 20 | 7419639785 |
| 21 | 21443156953 |
| 22 | 61971873769 |
| 23 | 179102039257 |
| 24 | 517614500173 |
| 25 | 1495933669445 |
| 26 | 4323328543981 |
[5,13,37,109,313,905,2617,7561,21853,63157,182525, 527509,1524529,4405969,12733489,36800465, 106355317,307372573,888323221,2567301757, 7419639785,21443156953,61971873769,179102039257, 517614500173,1495933669445,4323328543981] |