n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 1 |
6 | 4 |
7 | 14 |
8 | 41 |
9 | 111 |
10 | 282 |
11 | 688 |
12 | 1627 |
13 | 3761 |
14 | 8540 |
15 | 19122 |
16 | 42333 |
17 | 92851 |
18 | 202078 |
19 | 436916 |
20 | 939359 |
21 | 2009781 |
22 | 4281696 |
23 | 9087670 |
24 | 19223905 |
25 | 40544951 |
26 | 85284194 |
27 | 178956984 |
28 | 374691171 |
29 | 782936761 |
30 | 1632982372 |
31 | 3400182458 |
32 | 7068800357 |
33 | 14674471611 |
34 | 30422685030 |
[0,0,0,0,1,4,14,41,111,282,688,1627,3761,8540, 19122,42333,92851,202078,436916,939359,2009781, 4281696,9087670,19223905,40544951,85284194, 178956984,374691171,782936761,1632982372, 3400182458,7068800357,14674471611,30422685030] |