n | a(n) |
---|---|
1 | 0 |
2 | 2 |
3 | 8 |
4 | 52 |
5 | 248 |
6 | 1302 |
7 | 6448 |
8 | 32552 |
9 | 162448 |
10 | 813802 |
11 | 4067448 |
12 | 20345052 |
13 | 101717448 |
14 | 508626302 |
15 | 2543092448 |
16 | 12715657552 |
17 | 63578092448 |
18 | 317891438802 |
19 | 1589456217448 |
20 | 7947285970052 |
21 | 39736424967448 |
22 | 198682149251302 |
23 | 993410721842448 |
24 | 4967053731282552 |
[0,2,8,52,248,1302,6448,32552,162448,813802, 4067448,20345052,101717448,508626302,2543092448, 12715657552,63578092448,317891438802, 1589456217448,7947285970052,39736424967448, 198682149251302,993410721842448,4967053731282552] |