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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 5 |
| 5 | 7 |
| 6 | 47 |
| 7 | 37 |
| 8 | 319 |
| 9 | 533 |
| 10 | 1879 |
| 11 | 1627 |
| 12 | 20417 |
| 13 | 18107 |
| 14 | 263111 |
| 15 | 237371 |
| 16 | 52279 |
| 17 | 95549 |
| 18 | 1768477 |
| 19 | 1632341 |
| 20 | 33464927 |
| 21 | 155685007 |
| 22 | 166770367 |
| 23 | 156188887 |
| 24 | 3825136961 |
| 25 | 3602044091 |
| 26 | 19081066231 |
| 27 | 18051406831 |
| 28 | 57128792093 |
| 29 | 7751493599 |
[0,1,1,5,7,47,37,319,533,1879,1627,20417,18107, 263111,237371,52279,95549,1768477,1632341, 33464927,155685007,166770367,156188887,3825136961, 3602044091,19081066231,18051406831,57128792093, 7751493599] |