n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 2 |
4 | 8 |
5 | 22 |
6 | 72 |
7 | 218 |
8 | 691 |
9 | 2158 |
10 | 6833 |
11 | 21612 |
12 | 68726 |
13 | 218892 |
14 | 699197 |
15 | 2237450 |
16 | 7174018 |
17 | 23038582 |
18 | 74097134 |
19 | 238625222 |
20 | 769407486 |
21 | 2483532218 |
22 | 8024499657 |
23 | 25951580444 |
24 | 83999410292 |
25 | 272098963300 |
26 | 882045339733 |
27 | 2861184745710 |
28 | 9286923094550 |
29 | 30161343633746 |
[0,0,1,2,8,22,72,218,691,2158,6833,21612,68726, 218892,699197,2237450,7174018,23038582,74097134, 238625222,769407486,2483532218,8024499657, 25951580444,83999410292,272098963300,882045339733, 2861184745710,9286923094550,30161343633746] |