The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 11 |
| 3 | 59 |
| 4 | 146 |
| 5 | 319 |
| 6 | 124243 |
| 7 | 461867 |
| 8 | 1446247 |
| 9 | 4846042 |
| 10 | 16146448 |
| 11 | 19466227 |
| 12 | 57973091 |
| 13 | 73661929 |
| 14 | 208574393 |
| 15 | 681491953 |
| 16 | 883910281 |
| 17 | 1058487166 |
| 18 | 1066657966 |
| 19 | 1112633324 |
[1,7,11,59,146,319,124243,461867,1446247,4846042, 16146448,19466227,57973091,73661929,208574393, 681491953,883910281,1058487166,1066657966, 1112633324] |