n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 16 |
6 | 38 |
7 | 104 |
8 | 270 |
9 | 726 |
10 | 1960 |
11 | 5368 |
12 | 14736 |
13 | 40880 |
14 | 113828 |
15 | 318848 |
16 | 896670 |
17 | 2532160 |
18 | 7174050 |
19 | 20390552 |
20 | 58112088 |
21 | 166037248 |
22 | 475467916 |
23 | 1364393896 |
24 | 3922624800 |
25 | 11297181456 |
26 | 32588003000 |
27 | 94143178098 |
28 | 272342710380 |
29 | 788854912240 |
30 | 2287679084096 |
31 | 6641649422408 |
32 | 19302293185470 |
[1,1,2,6,16,38,104,270,726,1960,5368,14736,40880, 113828,318848,896670,2532160,7174050,20390552, 58112088,166037248,475467916,1364393896, 3922624800,11297181456,32588003000,94143178098, 272342710380,788854912240,2287679084096, 6641649422408,19302293185470] |