n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 12 |
6 | 33 |
7 | 90 |
8 | 260 |
9 | 763 |
10 | 2302 |
11 | 7035 |
12 | 21854 |
13 | 68581 |
14 | 217485 |
15 | 695229 |
16 | 2238965 |
17 | 7255380 |
18 | 23643501 |
19 | 77426852 |
20 | 254678757 |
21 | 841028918 |
22 | 2787320206 |
23 | 9267764857 |
24 | 30906754731 |
25 | 103350631437 |
26 | 346465277423 |
27 | 1164150100182 |
28 | 3920004155435 |
29 | 13225916804136 |
[0,1,1,2,5,12,33,90,260,763,2302,7035,21854,68581, 217485,695229,2238965,7255380,23643501,77426852, 254678757,841028918,2787320206,9267764857, 30906754731,103350631437,346465277423, 1164150100182,3920004155435,13225916804136] |