n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 26 |
3 | 302 |
4 | 2416 |
5 | 15619 |
6 | 88234 |
7 | 455192 |
8 | 2203488 |
9 | 10187685 |
10 | 45533450 |
11 | 198410786 |
12 | 848090912 |
13 | 3572085255 |
14 | 14875399450 |
15 | 61403313100 |
16 | 251732291184 |
17 | 1026509354985 |
18 | 4168403181210 |
19 | 16871482830550 |
20 | 68111623139600 |
[0,1,26,302,2416,15619,88234,455192,2203488, 10187685,45533450,198410786,848090912,3572085255, 14875399450,61403313100,251732291184, 1026509354985,4168403181210,16871482830550, 68111623139600] |