n | a(n) |
---|---|
1 | 2 |
2 | 2 |
3 | 5 |
4 | 13 |
5 | 37 |
6 | 108 |
7 | 332 |
8 | 1042 |
9 | 3360 |
10 | 11019 |
11 | 36722 |
12 | 123875 |
13 | 422449 |
14 | 1453553 |
15 | 5040816 |
16 | 17599468 |
17 | 61814275 |
18 | 218252584 |
19 | 774226549 |
20 | 2758043727 |
21 | 9862357697 |
22 | 35387662266 |
23 | 127374191687 |
24 | 459783039109 |
25 | 1664042970924 |
26 | 6037070913558 |
27 | 21951214425140 |
28 | 79981665585029 |
[2,2,5,13,37,108,332,1042,3360,11019,36722,123875, 422449,1453553,5040816,17599468,61814275, 218252584,774226549,2758043727,9862357697, 35387662266,127374191687,459783039109, 1664042970924,6037070913558,21951214425140, 79981665585029] |