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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 6 |
| 3 | 5 |
| 4 | 70 |
| 5 | 7 |
| 6 | 231 |
| 7 | 858 |
| 8 | 1430 |
| 9 | 12155 |
| 10 | 46189 |
| 11 | 176358 |
| 12 | 676039 |
| 13 | 104006 |
| 14 | 44574 |
| 15 | 1077205 |
| 16 | 66786710 |
| 17 | 64822395 |
| 18 | 90751353 |
| 19 | 353452638 |
| 20 | 3829070245 |
| 21 | 134564468610 |
| 22 | 526024740930 |
| 23 | 2287064091 |
| 24 | 35830670759 |
| 25 | 71661341518 |
| 26 | 281132955186 |
| 27 | 2483341104143 |
| 28 | 1912172650190110 |
[1,2,6,5,70,7,231,858,1430,12155,46189,176358, 676039,104006,44574,1077205,66786710,64822395, 90751353,353452638,3829070245,134564468610, 526024740930,2287064091,35830670759,71661341518, 281132955186,2483341104143,1912172650190110] |