n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 14 |
4 | 80 |
5 | 514 |
6 | 3567 |
7 | 26153 |
8 | 199900 |
9 | 1579107 |
10 | 12816020 |
11 | 106421359 |
12 | 901430144 |
13 | 7771535382 |
14 | 68085001080 |
15 | 605420138920 |
16 | 5459655601753 |
17 | 49904765136264 |
18 | 462228258349278 |
19 | 4337787743946224 |
20 | 41249375376404380 |
21 | 397572319756235577 |
[1,1,3,14,80,514,3567,26153,199900,1579107, 12816020,106421359,901430144,7771535382, 68085001080,605420138920,5459655601753, 49904765136264,462228258349278,4337787743946224, 41249375376404380,397572319756235577] |