n | a(n) |
---|---|
3 | 1 |
4 | 4 |
5 | 17 |
6 | 58 |
7 | 193 |
8 | 603 |
9 | 1852 |
10 | 5539 |
11 | 16391 |
12 | 47919 |
13 | 139258 |
14 | 402365 |
15 | 1159175 |
16 | 3330974 |
17 | 9561080 |
18 | 27421882 |
19 | 78642072 |
20 | 225566206 |
21 | 647308614 |
22 | 1858741431 |
23 | 5341591906 |
24 | 15363474607 |
25 | 44228744168 |
26 | 127444421304 |
27 | 367573522408 |
28 | 1061131077602 |
29 | 3066124030310 |
30 | 8867379519154 |
[1,4,17,58,193,603,1852,5539,16391,47919,139258, 402365,1159175,3330974,9561080,27421882,78642072, 225566206,647308614,1858741431,5341591906, 15363474607,44228744168,127444421304,367573522408, 1061131077602,3066124030310,8867379519154] |