n | a(n) |
---|---|
1 | 1 |
2 | 13 |
3 | 104 |
4 | 615 |
5 | 3149 |
6 | 14912 |
7 | 67537 |
8 | 297945 |
9 | 1293832 |
10 | 5564911 |
11 | 23795465 |
12 | 101383680 |
13 | 431003105 |
14 | 1829784725 |
15 | 7761645928 |
16 | 32906509335 |
17 | 139466630773 |
18 | 590979780544 |
19 | 2503927125041 |
20 | 10608105770625 |
21 | 44940061502216 |
[1,13,104,615,3149,14912,67537,297945,1293832, 5564911,23795465,101383680,431003105,1829784725, 7761645928,32906509335,139466630773,590979780544, 2503927125041,10608105770625,44940061502216] |