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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 3 |
| 6 | 15 |
| 7 | 22 |
| 8 | 38 |
| 9 | 147 |
| 10 | 296 |
| 11 | 526 |
| 12 | 2421 |
| 13 | 5017 |
| 14 | 10025 |
| 15 | 43986 |
| 16 | 96951 |
| 17 | 202141 |
| 18 | 880269 |
| 19 | 1993222 |
| 20 | 4317765 |
| 21 | 18453137 |
| 22 | 42777491 |
| 23 | 95192956 |
| 24 | 400944526 |
| 25 | 946008489 |
| 26 | 2151685046 |
| 27 | 8941940220 |
| 28 | 21409059701 |
| 29 | 49569448411 |
| 30 | 203582329338 |
| 31 | 493419056384 |
| 32 | 1159647133954 |
[1,1,2,3,3,15,22,38,147,296,526,2421,5017,10025, 43986,96951,202141,880269,1993222,4317765, 18453137,42777491,95192956,400944526,946008489, 2151685046,8941940220,21409059701,49569448411, 203582329338,493419056384,1159647133954] |