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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 1 |
| 5 | 2 |
| 6 | 8 |
| 7 | 14 |
| 8 | 45 |
| 9 | 99 |
| 10 | 230 |
| 11 | 451 |
| 12 | 953 |
| 13 | 1798 |
| 14 | 3503 |
| 15 | 6683 |
| 16 | 12693 |
| 17 | 24209 |
| 18 | 46155 |
| 19 | 89200 |
| 20 | 172767 |
| 21 | 338255 |
| 22 | 664453 |
| 23 | 1317945 |
| 24 | 2620363 |
| 25 | 5243700 |
| 26 | 10509348 |
| 27 | 21141700 |
| 28 | 42578221 |
| 29 | 85897588 |
| 30 | 173380086 |
| 31 | 350184780 |
| 32 | 707320136 |
| 33 | 1428681390 |
| 34 | 2885015407 |
| 35 | 5823971576 |
[1,1,2,1,2,8,14,45,99,230,451,953,1798,3503,6683, 12693,24209,46155,89200,172767,338255,664453, 1317945,2620363,5243700,10509348,21141700, 42578221,85897588,173380086,350184780,707320136, 1428681390,2885015407,5823971576] |