n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 10 |
4 | 28 |
5 | 76 |
6 | 208 |
7 | 568 |
8 | 1552 |
9 | 4240 |
10 | 11584 |
11 | 31648 |
12 | 86464 |
13 | 236224 |
14 | 645376 |
15 | 1763200 |
16 | 4817152 |
17 | 13160704 |
18 | 35955712 |
19 | 98232832 |
20 | 268377088 |
21 | 733219840 |
22 | 2003193856 |
23 | 5472827392 |
24 | 14952042496 |
25 | 40849739776 |
[1,1,4,10,28,76,208,568,1552,4240,11584,31648, 86464,236224,645376,1763200,4817152,13160704, 35955712,98232832,268377088,733219840,2003193856, 5472827392,14952042496,40849739776] |