n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 2 |
4 | 5 |
5 | 13 |
6 | 35 |
7 | 112 |
8 | 368 |
9 | 1208 |
10 | 3992 |
11 | 13449 |
12 | 46187 |
13 | 160804 |
14 | 565535 |
15 | 2005796 |
16 | 7168058 |
17 | 25793100 |
18 | 93388250 |
19 | 340005973 |
20 | 1244062960 |
21 | 4572478054 |
22 | 16874672868 |
23 | 62508259095 |
24 | 232338076267 |
25 | 866289458048 |
26 | 3239350667761 |
27 | 12145345634715 |
28 | 45649270140732 |
[1,0,2,5,13,35,112,368,1208,3992,13449,46187, 160804,565535,2005796,7168058,25793100,93388250, 340005973,1244062960,4572478054,16874672868, 62508259095,232338076267,866289458048, 3239350667761,12145345634715,45649270140732] |