The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 1933 |
| 3 | 3820 |
| 4 | 14888 |
| 5 | 62393 |
| 6 | 290474 |
| 7 | 1276034 |
| 8 | 5745665 |
| 9 | 26250580 |
| 10 | 117940632 |
| 11 | 529830532 |
| 12 | 2398014801 |
| 13 | 10851357559 |
| 14 | 49048617886 |
| 15 | 221887809644 |
| 16 | 1004033294806 |
| 17 | 4542287520456 |
| 18 | 20553927069804 |
| 19 | 93029936095342 |
| 20 | 421086056398025 |
[8,1933,3820,14888,62393,290474,1276034,5745665, 26250580,117940632,529830532,2398014801, 10851357559,49048617886,221887809644, 1004033294806,4542287520456,20553927069804, 93029936095342,421086056398025] |