The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 8 |
| 3 | 23 |
| 4 | 31 |
| 5 | 54 |
| 6 | 85 |
| 7 | 309 |
| 8 | 7810 |
| 9 | 8119 |
| 10 | 40286 |
| 11 | 128977 |
| 12 | 427217 |
| 13 | 3119496 |
| 14 | 162641009 |
| 15 | 165760505 |
| 16 | 494162019 |
| 17 | 1648246562 |
| 18 | 3790655143 |
| 19 | 58508073707 |
| 20 | 120806802557 |
| 21 | 300121678821 |
| 22 | 1321293517841 |
| 23 | 21440817964277 |
| 24 | 44202929446395 |
| 25 | 330861324089042 |
| 26 | 375064253535437 |
[1,7,8,23,31,54,85,309,7810,8119,40286,128977, 427217,3119496,162641009,165760505,494162019, 1648246562,3790655143,58508073707,120806802557, 300121678821,1321293517841,21440817964277, 44202929446395,330861324089042,375064253535437] |