n | a(n) |
---|---|
5 | 1 |
6 | 1 |
7 | 4 |
8 | 14 |
9 | 46 |
10 | 145 |
11 | 440 |
12 | 1315 |
13 | 3877 |
14 | 11315 |
15 | 32792 |
16 | 94529 |
17 | 271510 |
18 | 777764 |
19 | 2223865 |
20 | 6350657 |
21 | 18120730 |
22 | 51680249 |
23 | 147359335 |
24 | 420163711 |
25 | 1198151432 |
26 | 3417475326 |
27 | 9750708533 |
28 | 27831153091 |
29 | 79471338455 |
30 | 227032777454 |
31 | 648896436944 |
32 | 1855571389651 |
33 | 5308837191604 |
[1,1,4,14,46,145,440,1315,3877,11315,32792,94529, 271510,777764,2223865,6350657,18120730,51680249, 147359335,420163711,1198151432,3417475326, 9750708533,27831153091,79471338455,227032777454, 648896436944,1855571389651,5308837191604] |