n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 6 |
6 | 16 |
7 | 47 |
8 | 96 |
9 | 206 |
10 | 406 |
11 | 823 |
12 | 1626 |
13 | 3244 |
14 | 6454 |
15 | 12798 |
16 | 25715 |
17 | 51779 |
18 | 103315 |
19 | 206649 |
20 | 412883 |
21 | 825395 |
22 | 1650179 |
23 | 3299610 |
24 | 6600347 |
25 | 13201348 |
26 | 26403834 |
[0,0,0,1,6,16,47,96,206,406,823,1626,3244,6454, 12798,25715,51779,103315,206649,412883,825395, 1650179,3299610,6600347,13201348,26403834] |