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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 6 |
| 3 | 9 |
| 4 | 10 |
| 5 | 13 |
| 6 | 42 |
| 7 | 73 |
| 8 | 184 |
| 9 | 511 |
| 10 | 690 |
| 11 | 3275 |
| 12 | 18918 |
| 13 | 20574 |
| 14 | 21340 |
| 15 | 44140 |
| 16 | 116669 |
| 17 | 543214 |
| 18 | 567016 |
| 19 | 637321 |
| 20 | 688792 |
| 21 | 878649 |
| 22 | 2582446 |
| 23 | 27067133 |
| 24 | 152149612 |
| 25 | 180031091 |
| 26 | 180397517 |
| 27 | 290516940 |
| 28 | 303713151 |
| 29 | 749973242 |
| 30 | 1138167152 |
| 31 | 1149871982 |
| 32 | 1340024880 |
| 33 | 1992196101 |
[3,6,9,10,13,42,73,184,511,690,3275,18918,20574, 21340,44140,116669,543214,567016,637321,688792, 878649,2582446,27067133,152149612,180031091, 180397517,290516940,303713151,749973242, 1138167152,1149871982,1340024880,1992196101] |