The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 13 |
| 6 | 19 |
| 7 | 62 |
| 8 | 80 |
| 9 | 126 |
| 10 | 168 |
| 11 | 195 |
| 12 | 309 |
| 13 | 410 |
| 14 | 481 |
| 15 | 608 |
| 16 | 741 |
| 17 | 879 |
| 18 | 1176 |
| 19 | 2688 |
| 20 | 6236 |
| 21 | 16294 |
| 22 | 17317 |
| 23 | 31574 |
| 24 | 34861 |
| 25 | 35392 |
| 26 | 48726 |
[0,1,2,3,13,19,62,80,126,168,195,309,410,481,608, 741,879,1176,2688,6236,16294,17317,31574,34861, 35392,48726] |