The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 868 |
| 2 | 2228 |
| 3 | 5176 |
| 4 | 14072 |
| 5 | 37308 |
| 6 | 104404 |
| 7 | 283148 |
| 8 | 789060 |
| 9 | 2163684 |
| 10 | 6011124 |
| 11 | 16583140 |
| 12 | 45987596 |
| 13 | 127251428 |
| 14 | 352631604 |
| 15 | 977135580 |
| 16 | 2707604716 |
| 17 | 7507028260 |
| 18 | 20806607156 |
| 19 | 57698876836 |
| 20 | 159967392436 |
| 21 | 443630324756 |
| 22 | 1230252248020 |
[868,2228,5176,14072,37308,104404,283148,789060, 2163684,6011124,16583140,45987596,127251428, 352631604,977135580,2707604716,7507028260, 20806607156,57698876836,159967392436,443630324756, 1230252248020] |