The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 14 |
| 4 | 52 |
| 5 | 60 |
| 6 | 130 |
| 7 | 184 |
| 8 | 656 |
| 9 | 5472 |
| 10 | 8648 |
| 11 | 12008 |
| 12 | 34688 |
| 13 | 2118656 |
| 14 | 2500704 |
| 15 | 33721216 |
| 16 | 40575616 |
| 17 | 59376256 |
| 18 | 89397016 |
| 19 | 99523456 |
| 20 | 134438912 |
| 21 | 150441856 |
| 22 | 173706136 |
| 23 | 283417216 |
| 24 | 537346048 |
| 25 | 1082640256 |
| 26 | 6801628304 |
| 27 | 91707741184 |
[1,3,14,52,60,130,184,656,5472,8648,12008,34688, 2118656,2500704,33721216,40575616,59376256, 89397016,99523456,134438912,150441856,173706136, 283417216,537346048,1082640256,6801628304, 91707741184] |