n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 4 |
4 | 13 |
5 | 39 |
6 | 113 |
7 | 322 |
8 | 910 |
9 | 2561 |
10 | 7192 |
11 | 20175 |
12 | 56563 |
13 | 158535 |
14 | 444276 |
15 | 1244936 |
16 | 3488381 |
17 | 9774440 |
18 | 27387681 |
19 | 76739023 |
20 | 215018609 |
21 | 602469686 |
22 | 1688083894 |
23 | 4729907909 |
24 | 13252910268 |
25 | 37133833451 |
26 | 104046695091 |
27 | 291532369743 |
28 | 816855560248 |
29 | 2288778436672 |
30 | 6413014696201 |
[0,0,1,4,13,39,113,322,910,2561,7192,20175,56563, 158535,444276,1244936,3488381,9774440,27387681, 76739023,215018609,602469686,1688083894, 4729907909,13252910268,37133833451,104046695091, 291532369743,816855560248,2288778436672, 6413014696201] |