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| n | a(n) |
|---|---|
| 1 | 450 |
| 2 | 3111 |
| 3 | 22877 |
| 4 | 148389 |
| 5 | 945748 |
| 6 | 5125790 |
| 7 | 27587386 |
| 8 | 130018165 |
| 9 | 611215024 |
| 10 | 2593349603 |
| 11 | 10992085241 |
| 12 | 43067682706 |
| 13 | 168673810979 |
| 14 | 621760259909 |
| 15 | 2291824059768 |
| 16 | 8059474696068 |
| 17 | 28348577031630 |
| 18 | 96115434260034 |
[450,3111,22877,148389,945748,5125790,27587386, 130018165,611215024,2593349603,10992085241, 43067682706,168673810979,621760259909, 2291824059768,8059474696068,28348577031630, 96115434260034] |