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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 13 |
| 4 | 16 |
| 5 | 93 |
| 6 | 946 |
| 7 | 4823 |
| 8 | 5769 |
| 9 | 27899 |
| 10 | 61567 |
| 11 | 89466 |
| 12 | 3640207 |
| 13 | 3729673 |
| 14 | 11099553 |
| 15 | 48127885 |
| 16 | 59227438 |
| 17 | 344265075 |
| 18 | 3501878188 |
| 19 | 17853656015 |
| 20 | 21355534203 |
| 21 | 103275792827 |
| 22 | 227907119857 |
| 23 | 331182912684 |
| 24 | 13475223627217 |
| 25 | 13806406539901 |
| 26 | 41088036707019 |
[1,1,3,13,16,93,946,4823,5769,27899,61567,89466, 3640207,3729673,11099553,48127885,59227438, 344265075,3501878188,17853656015,21355534203, 103275792827,227907119857,331182912684, 13475223627217,13806406539901,41088036707019] |