n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 9 |
5 | 25 |
6 | 70 |
7 | 196 |
8 | 552 |
9 | 1560 |
10 | 4423 |
11 | 12573 |
12 | 35826 |
13 | 102310 |
14 | 292786 |
15 | 839554 |
16 | 2411945 |
17 | 6941593 |
18 | 20011328 |
19 | 57779038 |
20 | 167069317 |
21 | 483739961 |
22 | 1402413161 |
23 | 4070537585 |
24 | 11827842021 |
25 | 34403798725 |
26 | 100167396088 |
27 | 291903951462 |
28 | 851380987390 |
29 | 2485175809878 |
[0,0,1,3,9,25,70,196,552,1560,4423,12573,35826, 102310,292786,839554,2411945,6941593,20011328, 57779038,167069317,483739961,1402413161, 4070537585,11827842021,34403798725,100167396088, 291903951462,851380987390,2485175809878] |