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| n | a(n) |
|---|---|
| 1 | 46 |
| 2 | 698 |
| 3 | 4498 |
| 4 | 21334 |
| 5 | 86439 |
| 6 | 316136 |
| 7 | 1065625 |
| 8 | 3337831 |
| 9 | 9773219 |
| 10 | 26903878 |
| 11 | 70024867 |
| 12 | 173255292 |
| 13 | 409514526 |
| 14 | 928832014 |
| 15 | 2029581476 |
| 16 | 4287303027 |
| 17 | 8781854785 |
| 18 | 17488776976 |
| 19 | 33939319272 |
| 20 | 64311697250 |
| 21 | 119202262153 |
| 22 | 216450903569 |
[46,698,4498,21334,86439,316136,1065625,3337831, 9773219,26903878,70024867,173255292,409514526, 928832014,2029581476,4287303027,8781854785, 17488776976,33939319272,64311697250,119202262153, 216450903569] |