n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 11 |
5 | 26 |
6 | 66 |
7 | 161 |
8 | 420 |
9 | 1093 |
10 | 2916 |
11 | 7819 |
12 | 21304 |
13 | 58321 |
14 | 161233 |
15 | 448090 |
16 | 1253252 |
17 | 3521389 |
18 | 9941693 |
19 | 28175716 |
20 | 80152141 |
21 | 228747967 |
22 | 654817275 |
23 | 1879602446 |
24 | 5408974390 |
25 | 15601662378 |
26 | 45098766532 |
27 | 130624550412 |
[1,1,2,5,11,26,66,161,420,1093,2916,7819,21304, 58321,161233,448090,1253252,3521389,9941693, 28175716,80152141,228747967,654817275,1879602446, 5408974390,15601662378,45098766532,130624550412] |