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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 5 |
| 7 | 11 |
| 8 | 24 |
| 9 | 55 |
| 10 | 136 |
| 11 | 345 |
| 12 | 900 |
| 13 | 2412 |
| 14 | 6563 |
| 15 | 18127 |
| 16 | 50699 |
| 17 | 143255 |
| 18 | 408429 |
| 19 | 1173770 |
| 20 | 3396844 |
| 21 | 9892302 |
| 22 | 28972080 |
| 23 | 85289390 |
| 24 | 252260276 |
| 25 | 749329719 |
| 26 | 2234695030 |
| 27 | 6688893605 |
| 28 | 20089296554 |
| 29 | 60526543480 |
| 30 | 182896187256 |
| 31 | 554188210352 |
| 32 | 1683557607211 |
| 33 | 5126819371356 |
| 34 | 15647855317080 |
| 35 | 47862049187447 |
| 36 | 146691564302648 |
| 37 | 450451875783866 |
| 38 | 1385724615285949 |
[1,1,1,1,2,3,5,11,24,55,136,345,900,2412,6563, 18127,50699,143255,408429,1173770,3396844,9892302, 28972080,85289390,252260276,749329719,2234695030, 6688893605,20089296554,60526543480,182896187256, 554188210352,1683557607211,5126819371356, 15647855317080,47862049187447,146691564302648, 450451875783866,1385724615285949] |