n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 3 |
6 | 7 |
7 | 18 |
8 | 43 |
9 | 96 |
10 | 211 |
11 | 463 |
12 | 992 |
13 | 2112 |
14 | 4462 |
15 | 9347 |
16 | 19495 |
17 | 40480 |
18 | 83690 |
19 | 172478 |
20 | 354455 |
21 | 726538 |
22 | 1486024 |
23 | 3033644 |
24 | 6182389 |
25 | 12580486 |
[0,0,0,0,1,3,7,18,43,96,211,463,992,2112,4462, 9347,19495,40480,83690,172478,354455,726538, 1486024,3033644,6182389,12580486] |