n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 9 |
5 | 25 |
6 | 70 |
7 | 196 |
8 | 553 |
9 | 1569 |
10 | 4476 |
11 | 12826 |
12 | 36894 |
13 | 106470 |
14 | 308113 |
15 | 893803 |
16 | 2598313 |
17 | 7567465 |
18 | 22076404 |
19 | 64498426 |
20 | 188689684 |
21 | 552675364 |
22 | 1620567763 |
23 | 4756614061 |
24 | 13974168190 |
25 | 41088418150 |
26 | 120906613075 |
27 | 356035078101 |
28 | 1049120176953 |
29 | 3093337815409 |
[0,0,1,3,9,25,70,196,553,1569,4476,12826,36894, 106470,308113,893803,2598313,7567465,22076404, 64498426,188689684,552675364,1620567763, 4756614061,13974168190,41088418150,120906613075, 356035078101,1049120176953,3093337815409] |