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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 219 |
| 3 | 7858 |
| 4 | 221525 |
| 5 | 9253710 |
| 6 | 375158958 |
| 7 | 16882409364 |
| 8 | 736344816813 |
| 9 | 32964312771550 |
| 10 | 1471835619627770 |
| 11 | 66910145732699964 |
| 12 | 3061043035494001682 |
| 13 | 141458526138008430124 |
| 14 | 6567714993530314856700 |
| 15 | 306628434270114823521000 |
| 16 | 14370411994543866356077725 |
| 17 | 676259546148988495771751550 |
[13,219,7858,221525,9253710,375158958,16882409364, 736344816813,32964312771550,1471835619627770, 66910145732699964,3061043035494001682, 141458526138008430124,6567714993530314856700, 306628434270114823521000, 14370411994543866356077725, 676259546148988495771751550] |