n | a(n) |
---|---|
1 | 4 |
2 | 6 |
3 | 10 |
4 | 18 |
5 | 35 |
6 | 69 |
7 | 136 |
8 | 270 |
9 | 539 |
10 | 1077 |
11 | 2152 |
12 | 4303 |
13 | 8605 |
14 | 17208 |
15 | 34415 |
16 | 68829 |
17 | 137657 |
18 | 275313 |
19 | 550625 |
20 | 1101249 |
21 | 2202497 |
22 | 4404993 |
23 | 8809985 |
24 | 17619969 |
25 | 35239936 |
26 | 70479871 |
27 | 140959741 |
28 | 281919481 |
29 | 563838961 |
30 | 1127677921 |
31 | 2255355841 |
[4,6,10,18,35,69,136,270,539,1077,2152,4303,8605, 17208,34415,68829,137657,275313,550625,1101249, 2202497,4404993,8809985,17619969,35239936, 70479871,140959741,281919481,563838961,1127677921, 2255355841] |