n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 2 |
5 | 10 |
6 | 28 |
7 | 106 |
8 | 344 |
9 | 1272 |
10 | 4592 |
11 | 17692 |
12 | 69384 |
13 | 283560 |
14 | 1191984 |
15 | 5171512 |
16 | 23087168 |
17 | 105883456 |
18 | 498572416 |
19 | 2404766224 |
20 | 11878871456 |
21 | 59975885856 |
22 | 309439708352 |
23 | 1628919330208 |
24 | 8746079933568 |
25 | 47840206525056 |
[0,0,0,1,2,10,28,106,344,1272,4592,17692,69384, 283560,1191984,5171512,23087168,105883456, 498572416,2404766224,11878871456,59975885856, 309439708352,1628919330208,8746079933568, 47840206525056] |