n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 0 |
4 | 1 |
5 | 1 |
6 | 2 |
7 | 3 |
8 | 6 |
9 | 11 |
10 | 24 |
11 | 52 |
12 | 120 |
13 | 287 |
14 | 720 |
15 | 1871 |
16 | 5040 |
17 | 14034 |
18 | 40320 |
19 | 119292 |
20 | 362880 |
21 | 1133278 |
22 | 3628800 |
23 | 11899423 |
24 | 39916800 |
25 | 136843365 |
26 | 479001600 |
27 | 1710542068 |
28 | 6227020800 |
29 | 23092317922 |
30 | 87178291200 |
31 | 334838609873 |
32 | 1307674368000 |
33 | 5189998453040 |
[1,1,0,1,1,2,3,6,11,24,52,120,287,720,1871,5040, 14034,40320,119292,362880,1133278,3628800, 11899423,39916800,136843365,479001600,1710542068, 6227020800,23092317922,87178291200,334838609873, 1307674368000,5189998453040] |