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| n | a(n) |
|---|---|
| 2 | 26 |
| 3 | 896 |
| 4 | 18458 |
| 5 | 316928 |
| 6 | 5049626 |
| 7 | 77860736 |
| 8 | 1182865178 |
| 9 | 17848076288 |
| 10 | 268458094106 |
| 11 | 4032033838976 |
| 12 | 60516655913498 |
| 13 | 908002911016448 |
| 14 | 13621815273480986 |
| 15 | 204339630665964416 |
| 16 | 3065181271854043418 |
| 17 | 45978326763617681408 |
| 18 | 689679155263179402266 |
| 19 | 10345217105634885213056 |
[26,896,18458,316928,5049626,77860736,1182865178, 17848076288,268458094106,4032033838976, 60516655913498,908002911016448,13621815273480986, 204339630665964416,3065181271854043418, 45978326763617681408,689679155263179402266, 10345217105634885213056] |