n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 2 |
5 | 4 |
6 | 15 |
7 | 25 |
8 | 69 |
9 | 254 |
10 | 1799 |
11 | 4039 |
12 | 16828 |
13 | 61751 |
14 | 349831 |
15 | 3485031 |
16 | 10391139 |
17 | 49433136 |
18 | 240065255 |
19 | 1282012987 |
20 | 9167583734 |
21 | 131550812011 |
22 | 459677216341 |
23 | 2707382738559 |
24 | 14318807603110 |
25 | 94084166753927 |
26 | 601900541251447 |
27 | 5894253303715375 |
[1,1,1,2,2,4,15,25,69,254,1799,4039,16828,61751, 349831,3485031,10391139,49433136,240065255, 1282012987,9167583734,131550812011,459677216341, 2707382738559,14318807603110,94084166753927, 601900541251447,5894253303715375] |