The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 10 |
| 5 | 93 |
| 6 | 196 |
| 7 | 485 |
| 8 | 2136 |
| 9 | 13301 |
| 10 | 28738 |
| 11 | 42039 |
| 12 | 70777 |
| 13 | 254370 |
| 14 | 325147 |
| 15 | 6107016 |
| 16 | 6432163 |
| 17 | 44699994 |
| 18 | 51132157 |
| 19 | 146964308 |
| 20 | 198096465 |
| 21 | 345060773 |
| 22 | 1578339557 |
| 23 | 1923400330 |
| 24 | 82361153417 |
| 25 | 496090320832 |
| 26 | 578451474249 |
| 27 | 2809896217828 |
| 28 | 6198243909905 |
| 29 | 21404627947543 |
[1,2,3,10,93,196,485,2136,13301,28738,42039,70777, 254370,325147,6107016,6432163,44699994,51132157, 146964308,198096465,345060773,1578339557, 1923400330,82361153417,496090320832,578451474249, 2809896217828,6198243909905,21404627947543] |