n | a(n) |
---|---|
0 | 0 |
1 | 3 |
2 | 14 |
3 | 45 |
4 | 124 |
5 | 315 |
6 | 762 |
7 | 1785 |
8 | 4088 |
9 | 9207 |
10 | 20470 |
11 | 45045 |
12 | 98292 |
13 | 212979 |
14 | 458738 |
15 | 983025 |
16 | 2097136 |
17 | 4456431 |
18 | 9437166 |
19 | 19922925 |
20 | 41943020 |
21 | 88080363 |
22 | 184549354 |
23 | 385875945 |
24 | 805306344 |
25 | 1677721575 |
26 | 3489660902 |
27 | 7247757285 |
28 | 15032385508 |
[0,3,14,45,124,315,762,1785,4088,9207,20470,45045, 98292,212979,458738,983025,2097136,4456431, 9437166,19922925,41943020,88080363,184549354, 385875945,805306344,1677721575,3489660902, 7247757285,15032385508] |