The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1095 |
| 2 | 2755 |
| 3 | 7085 |
| 4 | 19119 |
| 5 | 62213 |
| 6 | 200215 |
| 7 | 645837 |
| 8 | 2386807 |
| 9 | 8440325 |
| 10 | 29121087 |
| 11 | 112850957 |
| 12 | 413112487 |
| 13 | 1461095205 |
| 14 | 5765335615 |
| 15 | 21394180445 |
| 16 | 76423033479 |
| 17 | 303819408773 |
| 18 | 1133934761455 |
| 19 | 4067862256797 |
| 20 | 16225029630247 |
| 21 | 60710982378005 |
[1095,2755,7085,19119,62213,200215,645837,2386807, 8440325,29121087,112850957,413112487,1461095205, 5765335615,21394180445,76423033479,303819408773, 1133934761455,4067862256797,16225029630247, 60710982378005] |