n | a(n) |
---|---|
0 | 2 |
1 | 1 |
2 | 7 |
3 | 10 |
4 | 31 |
5 | 61 |
6 | 154 |
7 | 337 |
8 | 799 |
9 | 1810 |
10 | 4207 |
11 | 9637 |
12 | 22258 |
13 | 51169 |
14 | 117943 |
15 | 271450 |
16 | 625279 |
17 | 1439629 |
18 | 3315466 |
19 | 7634353 |
20 | 17580751 |
21 | 40483810 |
22 | 93226063 |
23 | 214677493 |
24 | 494355682 |
25 | 1138388161 |
26 | 2621455207 |
27 | 6036619690 |
28 | 13900985311 |
29 | 32010844381 |
30 | 73713800314 |
31 | 169746333457 |
[2,1,7,10,31,61,154,337,799,1810,4207,9637,22258, 51169,117943,271450,625279,1439629,3315466, 7634353,17580751,40483810,93226063,214677493, 494355682,1138388161,2621455207,6036619690, 13900985311,32010844381,73713800314,169746333457] |