n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 5 |
5 | 24 |
6 | 116 |
7 | 561 |
8 | 2713 |
9 | 13120 |
10 | 63448 |
11 | 306833 |
12 | 1483837 |
13 | 7175800 |
14 | 34701996 |
15 | 167818017 |
16 | 811563889 |
17 | 3924703424 |
18 | 18979771248 |
19 | 91785716705 |
20 | 443873515701 |
21 | 2146561633048 |
22 | 10380720366244 |
23 | 50200913713873 |
24 | 242770409836169 |
25 | 1174031855833216 |
26 | 5677589783043784 |
[1,0,0,1,5,24,116,561,2713,13120,63448,306833, 1483837,7175800,34701996,167818017,811563889, 3924703424,18979771248,91785716705,443873515701, 2146561633048,10380720366244,50200913713873, 242770409836169,1174031855833216,5677589783043784] |