n | a(n) |
---|---|
1 | 0 |
2 | 3 |
3 | 8 |
4 | 25 |
5 | 54 |
6 | 153 |
7 | 322 |
8 | 899 |
9 | 1884 |
10 | 5247 |
11 | 10988 |
12 | 30589 |
13 | 64050 |
14 | 178293 |
15 | 373318 |
16 | 1039175 |
17 | 2175864 |
18 | 6056763 |
19 | 12681872 |
20 | 35301409 |
21 | 73915374 |
22 | 205751697 |
23 | 430810378 |
24 | 1199208779 |
25 | 2510946900 |
26 | 6989500983 |
27 | 14634871028 |
28 | 40737797125 |
[0,3,8,25,54,153,322,899,1884,5247,10988,30589, 64050,178293,373318,1039175,2175864,6056763, 12681872,35301409,73915374,205751697,430810378, 1199208779,2510946900,6989500983,14634871028, 40737797125] |