n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 8 |
3 | 24 |
4 | 69 |
5 | 201 |
6 | 582 |
7 | 1683 |
8 | 4866 |
9 | 14065 |
10 | 40649 |
11 | 117480 |
12 | 339524 |
13 | 981243 |
14 | 2835846 |
15 | 8195747 |
16 | 23686148 |
17 | 68454240 |
18 | 197836425 |
19 | 571757881 |
20 | 1652410946 |
21 | 4775556267 |
22 | 13801613767 |
23 | 39887404081 |
24 | 115276737285 |
25 | 333155954000 |
26 | 962838576968 |
[1,2,8,24,69,201,582,1683,4866,14065,40649,117480, 339524,981243,2835846,8195747,23686148,68454240, 197836425,571757881,1652410946,4775556267, 13801613767,39887404081,115276737285,333155954000, 962838576968] |