n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 1 |
4 | 4 |
5 | 7 |
6 | 18 |
7 | 39 |
8 | 90 |
9 | 206 |
10 | 470 |
11 | 1085 |
12 | 2492 |
13 | 5762 |
14 | 13314 |
15 | 30849 |
16 | 71556 |
17 | 166210 |
18 | 386562 |
19 | 899976 |
20 | 2097524 |
21 | 4892966 |
22 | 11423984 |
23 | 26693381 |
24 | 62417940 |
25 | 146053272 |
26 | 341970538 |
27 | 801168316 |
28 | 1878016792 |
29 | 4404544926 |
30 | 10335098184 |
31 | 24262063281 |
32 | 56980852484 |
33 | 133877548896 |
[0,0,1,1,4,7,18,39,90,206,470,1085,2492,5762, 13314,30849,71556,166210,386562,899976,2097524, 4892966,11423984,26693381,62417940,146053272, 341970538,801168316,1878016792,4404544926, 10335098184,24262063281,56980852484,133877548896] |