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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 28 |
| 4 | 31 |
| 5 | 59 |
| 6 | 385 |
| 7 | 444 |
| 8 | 829 |
| 9 | 7905 |
| 10 | 16639 |
| 11 | 24544 |
| 12 | 1194751 |
| 13 | 1219295 |
| 14 | 3633341 |
| 15 | 33919364 |
| 16 | 37552705 |
| 17 | 71472069 |
| 18 | 466385119 |
| 19 | 537857188 |
| 20 | 1004242307 |
| 21 | 9576037951 |
| 22 | 20156318209 |
| 23 | 29732356160 |
| 24 | 1447309413889 |
| 25 | 1477041770049 |
| 26 | 4401392953987 |
| 27 | 41089578355932 |
[1,1,3,28,31,59,385,444,829,7905,16639,24544, 1194751,1219295,3633341,33919364,37552705, 71472069,466385119,537857188,1004242307, 9576037951,20156318209,29732356160,1447309413889, 1477041770049,4401392953987,41089578355932] |