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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 5 |
| 6 | 19 |
| 7 | 13 |
| 8 | 47 |
| 9 | 51 |
| 10 | 139 |
| 11 | 107 |
| 12 | 623 |
| 13 | 351 |
| 14 | 1399 |
| 15 | 2171 |
| 16 | 4463 |
| 17 | 4115 |
| 18 | 22111 |
| 19 | 14601 |
| 20 | 68015 |
| 21 | 88375 |
| 22 | 209935 |
| 23 | 190745 |
| 24 | 1075199 |
| 25 | 839127 |
| 26 | 2796999 |
| 27 | 3730583 |
| 28 | 11276703 |
| 29 | 9587579 |
| 30 | 67195519 |
| 31 | 35792567 |
[0,1,2,5,5,19,13,47,51,139,107,623,351,1399,2171, 4463,4115,22111,14601,68015,88375,209935,190745, 1075199,839127,2796999,3730583,11276703,9587579, 67195519,35792567] |