n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 10 |
4 | 39 |
5 | 130 |
6 | 514 |
7 | 1943 |
8 | 7872 |
9 | 31706 |
10 | 131650 |
11 | 549751 |
12 | 2331370 |
13 | 9963328 |
14 | 42980063 |
15 | 186704975 |
16 | 816434120 |
17 | 3590695220 |
18 | 15873104022 |
19 | 70496228150 |
20 | 314392868577 |
21 | 1407453308237 |
22 | 6322525455282 |
23 | 28492055193081 |
24 | 128770519635266 |
25 | 583542383148631 |
26 | 2650954842074021 |
27 | 12070587215220593 |
[1,1,4,10,39,130,514,1943,7872,31706,131650, 549751,2331370,9963328,42980063,186704975, 816434120,3590695220,15873104022,70496228150, 314392868577,1407453308237,6322525455282, 28492055193081,128770519635266,583542383148631, 2650954842074021,12070587215220593] |