n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 57 |
3 | 488 |
4 | 4140 |
5 | 34128 |
6 | 276792 |
7 | 2208312 |
8 | 17389710 |
9 | 135354340 |
10 | 1042965042 |
11 | 7964675400 |
12 | 60337114778 |
13 | 453795079932 |
14 | 3390657365970 |
15 | 25182770127240 |
16 | 186007882964211 |
17 | 1366948744701066 |
18 | 9998341947058175 |
19 | 72811720605519840 |
20 | 528078809473488744 |
21 | 3815340122599096360 |
[1,6,57,488,4140,34128,276792,2208312,17389710, 135354340,1042965042,7964675400,60337114778, 453795079932,3390657365970,25182770127240, 186007882964211,1366948744701066,9998341947058175, 72811720605519840,528078809473488744, 3815340122599096360] |