n | a(n) |
---|---|
0 | 2 |
1 | 1 |
2 | 4 |
3 | 14 |
4 | 53 |
5 | 227 |
6 | 1092 |
7 | 5791 |
8 | 33350 |
9 | 206511 |
10 | 1365563 |
11 | 9590847 |
12 | 71216713 |
13 | 556861216 |
14 | 4569168866 |
15 | 39222394456 |
16 | 351304769679 |
17 | 3275433717440 |
18 | 31723522878974 |
19 | 318571978752719 |
20 | 3311400814816987 |
21 | 35573458376435132 |
22 | 394404160256111139 |
23 | 4507130777468928696 |
[2,1,4,14,53,227,1092,5791,33350,206511,1365563, 9590847,71216713,556861216,4569168866,39222394456, 351304769679,3275433717440,31723522878974, 318571978752719,3311400814816987, 35573458376435132,394404160256111139, 4507130777468928696] |