n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 12 |
6 | 28 |
7 | 65 |
8 | 151 |
9 | 351 |
10 | 816 |
11 | 1897 |
12 | 4410 |
13 | 10252 |
14 | 23833 |
15 | 55405 |
16 | 128801 |
17 | 299426 |
18 | 696081 |
19 | 1618192 |
20 | 3761840 |
21 | 8745217 |
22 | 20330163 |
23 | 47261895 |
24 | 109870576 |
25 | 255418101 |
26 | 593775046 |
27 | 1380359512 |
28 | 3208946545 |
[1,1,1,2,5,12,28,65,151,351,816,1897,4410,10252, 23833,55405,128801,299426,696081,1618192,3761840, 8745217,20330163,47261895,109870576,255418101, 593775046,1380359512,3208946545] |