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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 16 |
| 6 | 21 |
| 7 | 102 |
| 8 | 109 |
| 9 | 565 |
| 10 | 826 |
| 11 | 4913 |
| 12 | 4924 |
| 13 | 28036 |
| 14 | 28049 |
| 15 | 378218 |
| 16 | 427646 |
| 17 | 1841532 |
| 18 | 1841549 |
| 19 | 29704312 |
| 20 | 29704331 |
| 21 | 182590131 |
| 22 | 194454702 |
| 23 | 3660242371 |
| 24 | 3660242394 |
| 25 | 17058569521 |
| 26 | 17059419626 |
| 27 | 308650641577 |
| 28 | 311298706504 |
| 29 | 1436650115240 |
| 30 | 1436650115269 |
[1,1,3,6,16,21,102,109,565,826,4913,4924,28036, 28049,378218,427646,1841532,1841549,29704312, 29704331,182590131,194454702,3660242371, 3660242394,17058569521,17059419626,308650641577, 311298706504,1436650115240,1436650115269] |