n | a(n) |
---|---|
1 | 0 |
2 | 2 |
3 | 7 |
4 | 30 |
5 | 144 |
6 | 597 |
7 | 2742 |
8 | 12148 |
9 | 54696 |
10 | 247482 |
11 | 1120330 |
12 | 5099759 |
13 | 23249035 |
14 | 106285418 |
15 | 486878283 |
16 | 2234333944 |
17 | 10271022863 |
18 | 47283130811 |
19 | 217962771486 |
20 | 1005958652638 |
21 | 4647869260260 |
22 | 21496269109425 |
23 | 99510938004788 |
24 | 461047642206301 |
25 | 2137763442289891 |
26 | 9919444208575431 |
27 | 46058149007746511 |
28 | 213991712768042425 |
29 | 994811217776431456 |
30 | 4627232005483362687 |
[0,2,7,30,144,597,2742,12148,54696,247482,1120330, 5099759,23249035,106285418,486878283,2234333944, 10271022863,47283130811,217962771486, 1005958652638,4647869260260,21496269109425, 99510938004788,461047642206301,2137763442289891, 9919444208575431,46058149007746511, 213991712768042425,994811217776431456, 4627232005483362687] |