n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 9 |
5 | 28 |
6 | 66 |
7 | 153 |
8 | 433 |
9 | 1345 |
10 | 3952 |
11 | 10991 |
12 | 30954 |
13 | 90988 |
14 | 271845 |
15 | 804153 |
16 | 2361457 |
17 | 6979690 |
18 | 20842285 |
19 | 62493914 |
20 | 187274712 |
21 | 561448399 |
22 | 1688263179 |
23 | 5093148285 |
24 | 15393417178 |
25 | 46570446829 |
26 | 141063389488 |
27 | 427979185898 |
28 | 1300470246165 |
29 | 3956367018001 |
30 | 12048354848013 |
31 | 36728336040306 |
[1,1,1,2,9,28,66,153,433,1345,3952,10991,30954, 90988,271845,804153,2361457,6979690,20842285, 62493914,187274712,561448399,1688263179, 5093148285,15393417178,46570446829,141063389488, 427979185898,1300470246165,3956367018001, 12048354848013,36728336040306] |