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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 5 |
| 4 | 47 |
| 5 | 11 |
| 6 | 221 |
| 7 | 17 |
| 8 | 1217 |
| 9 | 941 |
| 10 | 2747 |
| 11 | 8081 |
| 12 | 9281 |
| 13 | 41 |
| 14 | 55661 |
| 15 | 19421 |
| 16 | 333491 |
| 17 | 1262201 |
| 18 | 601037 |
| 19 | 5237651 |
| 20 | 9063641 |
| 21 | 12899891 |
| 22 | 26149427 |
| 23 | 24073871 |
| 24 | 28537121 |
| 25 | 352031501 |
| 26 | 398878547 |
| 27 | 160834691 |
| 28 | 67374467 |
| 29 | 146452961 |
| 30 | 24169417397 |
[0,1,5,47,11,221,17,1217,941,2747,8081,9281,41, 55661,19421,333491,1262201,601037,5237651,9063641, 12899891,26149427,24073871,28537121,352031501, 398878547,160834691,67374467,146452961, 24169417397] |