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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 10 |
| 11 | 55 |
| 12 | 220 |
| 13 | 715 |
| 14 | 2002 |
| 15 | 5005 |
| 16 | 11440 |
| 17 | 24310 |
| 18 | 48620 |
| 19 | 92378 |
| 20 | 190 |
| 21 | 1330 |
| 22 | 7315 |
| 23 | 33649 |
| 24 | 134596 |
| 25 | 480700 |
| 26 | 1562275 |
| 27 | 4686825 |
| 28 | 13123110 |
| 29 | 34597290 |
| 30 | 4060 |
| 31 | 31465 |
| 32 | 201376 |
| 33 | 1107568 |
| 34 | 5379616 |
| 35 | 23535820 |
| 36 | 94143280 |
| 37 | 348330136 |
| 38 | 1203322288 |
[1,1,1,1,1,1,1,1,1,1,10,55,220,715,2002,5005, 11440,24310,48620,92378,190,1330,7315,33649, 134596,480700,1562275,4686825,13123110,34597290, 4060,31465,201376,1107568,5379616,23535820, 94143280,348330136,1203322288] |