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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 34 |
| 4 | 869 |
| 5 | 75866 |
| 6 | 28213327 |
| 7 | 39049033346 |
| 8 | 256215628707257 |
| 9 | 7710689746589777938 |
| 10 | 1063776147486867074877851 |
| 11 | 870059224717752809087935599002 |
| 12 | 3104894940194751778363241199111802885 |
| 13 | 77521065749331962430758061530260243383954602 |
[1,2,5,34,869,75866,28213327,39049033346, 256215628707257,7710689746589777938, 1063776147486867074877851, 870059224717752809087935599002, 3104894940194751778363241199111802885, 77521065749331962430758061530260243383954602] |