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| n | a(n) |
|---|---|
| 1 | 9560 |
| 2 | 26370 |
| 3 | 89310 |
| 4 | 301423 |
| 5 | 832322 |
| 6 | 2360757 |
| 7 | 6432784 |
| 8 | 15616153 |
| 9 | 36543872 |
| 10 | 81734961 |
| 11 | 174022362 |
| 12 | 365039765 |
| 13 | 745189794 |
| 14 | 1482844047 |
| 15 | 2915388714 |
| 16 | 5666583615 |
| 17 | 10928887048 |
| 18 | 20997312222 |
| 19 | 40160583566 |
| 20 | 76571761037 |
| 21 | 145770214166 |
[9560,26370,89310,301423,832322,2360757,6432784, 15616153,36543872,81734961,174022362,365039765, 745189794,1482844047,2915388714,5666583615, 10928887048,20997312222,40160583566,76571761037, 145770214166] |