n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 3 |
4 | 16 |
5 | 60 |
6 | 192 |
7 | 552 |
8 | 1439 |
9 | 3469 |
10 | 7836 |
11 | 16746 |
12 | 34119 |
13 | 66688 |
14 | 125668 |
15 | 229261 |
16 | 406311 |
17 | 701575 |
18 | 1183187 |
19 | 1953088 |
20 | 3161413 |
21 | 5026098 |
22 | 7859320 |
23 | 12102784 |
24 | 18374396 |
25 | 27529455 |
26 | 40740236 |
27 | 59598715 |
28 | 86248245 |
29 | 123551209 |
30 | 175301158 |
[0,1,3,16,60,192,552,1439,3469,7836,16746,34119, 66688,125668,229261,406311,701575,1183187,1953088, 3161413,5026098,7859320,12102784,18374396, 27529455,40740236,59598715,86248245,123551209, 175301158] |