The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 3 |
| 3 | 7 |
| 4 | 17 |
| 5 | 35 |
| 6 | 70 |
| 7 | 134 |
| 8 | 251 |
| 9 | 461 |
| 10 | 835 |
| 11 | 1495 |
| 12 | 2652 |
| 13 | 4668 |
| 14 | 8163 |
| 15 | 14195 |
| 16 | 24565 |
| 17 | 42331 |
| 18 | 72674 |
| 19 | 124354 |
| 20 | 212155 |
| 21 | 360985 |
| 22 | 612743 |
| 23 | 1037807 |
| 24 | 1754232 |
| 25 | 2959800 |
| 26 | 4985475 |
| 27 | 8384479 |
| 28 | 14080601 |
| 29 | 23614931 |
| 30 | 39556030 |
| 31 | 66181310 |
| 32 | 110608187 |
| 33 | 184670693 |
| 34 | 308030923 |
| 35 | 513334855 |
[0,0,3,7,17,35,70,134,251,461,835,1495,2652,4668, 8163,14195,24565,42331,72674,124354,212155,360985, 612743,1037807,1754232,2959800,4985475,8384479, 14080601,23614931,39556030,66181310,110608187, 184670693,308030923,513334855] |