n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 4 |
4 | 5 |
5 | 15 |
6 | 28 |
7 | 60 |
8 | 117 |
9 | 230 |
10 | 440 |
11 | 834 |
12 | 1560 |
13 | 2891 |
14 | 5310 |
15 | 9680 |
16 | 17527 |
17 | 31545 |
18 | 56468 |
19 | 100590 |
20 | 178395 |
21 | 315106 |
22 | 554530 |
23 | 972564 |
24 | 1700400 |
25 | 2964325 |
26 | 5153868 |
27 | 8938300 |
28 | 15465497 |
29 | 26700915 |
30 | 46004620 |
31 | 79112304 |
32 | 135801105 |
33 | 232715006 |
34 | 398151740 |
[1,0,4,5,15,28,60,117,230,440,834,1560,2891,5310, 9680,17527,31545,56468,100590,178395,315106, 554530,972564,1700400,2964325,5153868,8938300, 15465497,26700915,46004620,79112304,135801105, 232715006,398151740] |