The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 144 |
| 3 | 958 |
| 4 | 5711 |
| 5 | 33037 |
| 6 | 185351 |
| 7 | 1020454 |
| 8 | 5541360 |
| 9 | 29819624 |
| 10 | 159467459 |
| 11 | 849225129 |
| 12 | 4509414280 |
| 13 | 23898381925 |
| 14 | 126482308739 |
| 15 | 668788464753 |
| 16 | 3534016278284 |
| 17 | 18666169109994 |
| 18 | 98561504556257 |
| 19 | 520314362243096 |
[12,144,958,5711,33037,185351,1020454,5541360, 29819624,159467459,849225129,4509414280, 23898381925,126482308739,668788464753, 3534016278284,18666169109994,98561504556257, 520314362243096] |