n | a(n) |
---|---|
0 | 0 |
1 | 3 |
2 | 6 |
3 | 27 |
4 | 84 |
5 | 303 |
6 | 1026 |
7 | 3567 |
8 | 12264 |
9 | 42363 |
10 | 146046 |
11 | 503907 |
12 | 1738044 |
13 | 5995623 |
14 | 20681466 |
15 | 71341047 |
16 | 246089424 |
17 | 848884083 |
18 | 2928215286 |
19 | 10100850987 |
20 | 34842778404 |
21 | 120189811743 |
22 | 414593515506 |
23 | 1430136089727 |
24 | 4933239756984 |
25 | 17017159962603 |
26 | 58700518710126 |
[0,3,6,27,84,303,1026,3567,12264,42363,146046, 503907,1738044,5995623,20681466,71341047, 246089424,848884083,2928215286,10100850987, 34842778404,120189811743,414593515506, 1430136089727,4933239756984,17017159962603, 58700518710126] |