n | a(n) |
---|---|
0 | -1 |
1 | 2 |
2 | 3 |
3 | 8 |
4 | 19 |
5 | 46 |
6 | 111 |
7 | 268 |
8 | 647 |
9 | 1562 |
10 | 3771 |
11 | 9104 |
12 | 21979 |
13 | 53062 |
14 | 128103 |
15 | 309268 |
16 | 746639 |
17 | 1802546 |
18 | 4351731 |
19 | 10506008 |
20 | 25363747 |
21 | 61233502 |
22 | 147830751 |
23 | 356895004 |
24 | 861620759 |
25 | 2080136522 |
26 | 5021893803 |
27 | 12123924128 |
28 | 29269742059 |
29 | 70663408246 |
30 | 170596558551 |
31 | 411856525348 |
[-1,2,3,8,19,46,111,268,647,1562,3771,9104,21979, 53062,128103,309268,746639,1802546,4351731, 10506008,25363747,61233502,147830751,356895004, 861620759,2080136522,5021893803,12123924128, 29269742059,70663408246,170596558551,411856525348] |