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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 45 |
| 3 | 685 |
| 4 | 20409 |
| 5 | 1201941 |
| 6 | 141147379 |
| 7 | 32952001519 |
| 8 | 15299378914117 |
| 9 | 14127550190798059 |
| 10 | 25944752255914338751 |
| 11 | 94759724685920514675099 |
| 12 | 688318811614248548827285461 |
| 13 | 9943676783895971991257124086453 |
| 14 | 285690558616920990681823749334591359 |
| 15 | 16324365307318944099676240468111164604873 |
[1,7,45,685,20409,1201941,141147379,32952001519, 15299378914117,14127550190798059, 25944752255914338751,94759724685920514675099, 688318811614248548827285461, 9943676783895971991257124086453, 285690558616920990681823749334591359, 16324365307318944099676240468111164604873] |