n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 44 |
6 | 80 |
7 | 144 |
8 | 264 |
9 | 484 |
10 | 888 |
11 | 1632 |
12 | 3000 |
13 | 5516 |
14 | 10144 |
15 | 18656 |
16 | 34312 |
17 | 63108 |
18 | 116072 |
19 | 213488 |
20 | 392664 |
21 | 722220 |
22 | 1328368 |
23 | 2443248 |
24 | 4493832 |
25 | 8265444 |
26 | 15202520 |
27 | 27961792 |
28 | 51429752 |
29 | 94594060 |
30 | 173985600 |
31 | 320009408 |
32 | 588589064 |
33 | 1082584068 |
34 | 1991182536 |
[1,1,2,6,24,44,80,144,264,484,888,1632,3000,5516, 10144,18656,34312,63108,116072,213488,392664, 722220,1328368,2443248,4493832,8265444,15202520, 27961792,51429752,94594060,173985600,320009408, 588589064,1082584068,1991182536] |