n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 15 |
4 | 45 |
5 | 110 |
6 | 271 |
7 | 599 |
8 | 1309 |
9 | 2690 |
10 | 5436 |
11 | 10545 |
12 | 20148 |
13 | 37341 |
14 | 68223 |
15 | 121878 |
16 | 214846 |
17 | 371993 |
18 | 636570 |
19 | 1073325 |
20 | 1790721 |
21 | 2950922 |
22 | 4816603 |
23 | 7778937 |
24 | 12455988 |
25 | 19761148 |
26 | 31108121 |
27 | 48572686 |
28 | 75307513 |
29 | 115909727 |
30 | 177255526 |
31 | 269294119 |
32 | 406708721 |
33 | 610593948 |
[1,1,5,15,45,110,271,599,1309,2690,5436,10545, 20148,37341,68223,121878,214846,371993,636570, 1073325,1790721,2950922,4816603,7778937,12455988, 19761148,31108121,48572686,75307513,115909727, 177255526,269294119,406708721,610593948] |