n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 6 |
4 | 21 |
5 | 45 |
6 | 144 |
7 | 378 |
8 | 1161 |
9 | 3321 |
10 | 10044 |
11 | 29646 |
12 | 89181 |
13 | 266085 |
14 | 798984 |
15 | 2392578 |
16 | 7179921 |
17 | 21526641 |
18 | 64586484 |
19 | 193720086 |
20 | 581179941 |
21 | 1743421725 |
22 | 5230324224 |
23 | 15690618378 |
24 | 47072032281 |
25 | 141215033961 |
26 | 423645633324 |
27 | 1270933711326 |
28 | 3812802728301 |
29 | 11438398618965 |
30 | 34315200639864 |
[1,4,6,21,45,144,378,1161,3321,10044,29646,89181, 266085,798984,2392578,7179921,21526641,64586484, 193720086,581179941,1743421725,5230324224, 15690618378,47072032281,141215033961,423645633324, 1270933711326,3812802728301,11438398618965, 34315200639864] |