n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 20 |
3 | 68 |
4 | 208 |
5 | 592 |
6 | 1600 |
7 | 4160 |
8 | 10496 |
9 | 25856 |
10 | 62464 |
11 | 148480 |
12 | 348160 |
13 | 806912 |
14 | 1851392 |
15 | 4210688 |
16 | 9502720 |
17 | 21299200 |
18 | 47448064 |
19 | 105119744 |
20 | 231735296 |
21 | 508559360 |
22 | 1111490560 |
23 | 2420113408 |
24 | 5251268608 |
25 | 11358175232 |
26 | 24494735360 |
[1,5,20,68,208,592,1600,4160,10496,25856,62464, 148480,348160,806912,1851392,4210688,9502720, 21299200,47448064,105119744,231735296,508559360, 1111490560,2420113408,5251268608,11358175232, 24494735360] |