The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 215 |
| 4 | 13544 |
| 5 | 1646568 |
| 6 | 342128448 |
| 7 | 111806434449 |
| 8 | 54089613731960 |
| 9 | 36991616761628936 |
| 10 | 34487632073741256512 |
| 11 | 42564197996724997147672 |
| 12 | 67876867685905911079322176 |
| 13 | 137043021921732373141812704320 |
| 14 | 344286933629331983612822165758464 |
| 15 | 1060279482920092978432461141783224583 |
[1,1,8,215,13544,1646568,342128448,111806434449, 54089613731960,36991616761628936, 34487632073741256512,42564197996724997147672, 67876867685905911079322176, 137043021921732373141812704320, 344286933629331983612822165758464, 1060279482920092978432461141783224583] |