The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 3 |
| 4 | 9 |
| 5 | 11 |
| 6 | 26 |
| 7 | 39 |
| 8 | 42 |
| 9 | 58 |
| 10 | 75 |
| 11 | 105 |
| 12 | 167 |
| 13 | 279 |
| 14 | 561 |
| 15 | 2152 |
| 16 | 2378 |
| 17 | 3774 |
| 18 | 5001 |
| 19 | 5736 |
| 20 | 9470 |
| 21 | 13419 |
| 22 | 14535 |
| 23 | 32291 |
| 24 | 89800 |
| 25 | 146421 |
[0,2,3,9,11,26,39,42,58,75,105,167,279,561,2152, 2378,3774,5001,5736,9470,13419,14535,32291,89800, 146421] |