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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 41 |
| 3 | 427 |
| 4 | 4997 |
| 5 | 62697 |
| 6 | 824361 |
| 7 | 11210331 |
| 8 | 156371609 |
| 9 | 2224976461 |
| 10 | 32167995497 |
| 11 | 471208730027 |
| 12 | 6978452945485 |
| 13 | 104313403711649 |
| 14 | 1571764793999769 |
| 15 | 23847629857934859 |
| 16 | 364033580432140593 |
| 17 | 5586881305151655381 |
| 18 | 86153520326218040553 |
| 19 | 1334246446733337499755 |
| 20 | 20743139707001572645461 |
[1,5,41,427,4997,62697,824361,11210331,156371609, 2224976461,32167995497,471208730027,6978452945485, 104313403711649,1571764793999769, 23847629857934859,364033580432140593, 5586881305151655381,86153520326218040553, 1334246446733337499755,20743139707001572645461] |