n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 4 |
4 | 6 |
5 | 13 |
6 | 48 |
7 | 150 |
8 | 300 |
9 | 666 |
10 | 936 |
11 | 1824 |
12 | 2520 |
13 | 2160 |
14 | 5040 |
15 | 75 |
16 | 536 |
17 | 2820 |
18 | 11144 |
19 | 41346 |
20 | 131304 |
21 | 420084 |
22 | 1191552 |
23 | 3427008 |
24 | 9207456 |
25 | 23466720 |
26 | 61522560 |
27 | 141553560 |
28 | 345346560 |
29 | 777152160 |
30 | 1635096960 |
31 | 3700806480 |
32 | 6998261760 |
33 | 14211912960 |
34 | 27442437120 |
[1,1,3,4,6,13,48,150,300,666,936,1824,2520,2160, 5040,75,536,2820,11144,41346,131304,420084, 1191552,3427008,9207456,23466720,61522560, 141553560,345346560,777152160,1635096960, 3700806480,6998261760,14211912960,27442437120] |