n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 20 |
3 | 52 |
4 | 129 |
5 | 315 |
6 | 764 |
7 | 1848 |
8 | 4465 |
9 | 10783 |
10 | 26036 |
11 | 62860 |
12 | 151761 |
13 | 366387 |
14 | 884540 |
15 | 2135472 |
16 | 5155489 |
17 | 12446455 |
18 | 30048404 |
19 | 72543268 |
20 | 175134945 |
21 | 422813163 |
22 | 1020761276 |
23 | 2464335720 |
24 | 5949432721 |
25 | 14363201167 |
26 | 34675835060 |
27 | 83714871292 |
28 | 202105577649 |
29 | 487926026595 |
[1,7,20,52,129,315,764,1848,4465,10783,26036, 62860,151761,366387,884540,2135472,5155489, 12446455,30048404,72543268,175134945,422813163, 1020761276,2464335720,5949432721,14363201167, 34675835060,83714871292,202105577649,487926026595] |