The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 3268 |
| 2 | 37772 |
| 3 | 273607 |
| 4 | 1457326 |
| 5 | 6247708 |
| 6 | 22806904 |
| 7 | 73607411 |
| 8 | 215673388 |
| 9 | 585010044 |
| 10 | 1491014836 |
| 11 | 3612638417 |
| 12 | 8399798586 |
| 13 | 18886662616 |
| 14 | 41329088816 |
| 15 | 88489078029 |
| 16 | 186209112216 |
| 17 | 386557846820 |
| 18 | 794103892572 |
| 19 | 1618422517619 |
| 20 | 3279033220486 |
[3268,37772,273607,1457326,6247708,22806904, 73607411,215673388,585010044,1491014836, 3612638417,8399798586,18886662616,41329088816, 88489078029,186209112216,386557846820, 794103892572,1618422517619,3279033220486] |