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| n | a(n) |
|---|---|
| 67 | 1 |
| 68 | 68 |
| 69 | 2346 |
| 70 | 54740 |
| 71 | 971635 |
| 72 | 13991544 |
| 73 | 170230452 |
| 74 | 1799579064 |
| 75 | 16871053725 |
| 76 | 142466675900 |
| 77 | 1096993404430 |
| 78 | 7778680504140 |
| 79 | 51209646652255 |
| 80 | 315136287090800 |
| 81 | 1823288518168200 |
| 82 | 9967310565986160 |
| 83 | 51705423561053205 |
[1,68,2346,54740,971635,13991544,170230452, 1799579064,16871053725,142466675900,1096993404430, 7778680504140,51209646652255,315136287090800, 1823288518168200,9967310565986160, 51705423561053205] |