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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 13 |
| 3 | 2 |
| 4 | 11 |
| 5 | 32 |
| 6 | 42 |
| 7 | 104 |
| 8 | 269 |
| 9 | 523 |
| 10 | 1761 |
| 11 | 4271 |
| 12 | 9950 |
| 13 | 33236 |
| 14 | 84720 |
| 15 | 210683 |
| 16 | 665446 |
| 17 | 1772832 |
| 18 | 4540852 |
| 19 | 13723354 |
| 20 | 37563820 |
| 21 | 98003395 |
| 22 | 287421335 |
| 23 | 798136234 |
| 24 | 2112310069 |
| 25 | 6070832044 |
| 26 | 16971983943 |
| 27 | 45446410743 |
| 28 | 128849163703 |
| 29 | 361098610655 |
[1,13,2,11,32,42,104,269,523,1761,4271,9950,33236, 84720,210683,665446,1772832,4540852,13723354, 37563820,98003395,287421335,798136234,2112310069, 6070832044,16971983943,45446410743,128849163703, 361098610655] |