n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 0 |
4 | 0 |
5 | 2 |
6 | 2 |
7 | 3 |
8 | 19 |
9 | 42 |
10 | 82 |
11 | 280 |
12 | 768 |
13 | 1807 |
14 | 5167 |
15 | 14713 |
16 | 38361 |
17 | 105722 |
18 | 299954 |
19 | 821480 |
20 | 2272736 |
21 | 6422244 |
22 | 17979356 |
23 | 50311418 |
24 | 142328594 |
25 | 402652059 |
26 | 1137986155 |
27 | 3232284414 |
28 | 9201271726 |
29 | 26196062383 |
30 | 74759129271 |
31 | 213809119056 |
[1,1,0,0,2,2,3,19,42,82,280,768,1807,5167,14713, 38361,105722,299954,821480,2272736,6422244, 17979356,50311418,142328594,402652059,1137986155, 3232284414,9201271726,26196062383,74759129271, 213809119056] |