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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 301 |
| 3 | 2747 |
| 4 | 37431 |
| 5 | 490668 |
| 6 | 6069953 |
| 7 | 78105580 |
| 8 | 994666167 |
| 9 | 12644605701 |
| 10 | 161191403242 |
| 11 | 2052476777491 |
| 12 | 26138049499179 |
| 13 | 332906349627080 |
| 14 | 4239664089907890 |
| 15 | 53994948962929686 |
| 16 | 687661857639787158 |
[13,301,2747,37431,490668,6069953,78105580, 994666167,12644605701,161191403242,2052476777491, 26138049499179,332906349627080,4239664089907890, 53994948962929686,687661857639787158] |