n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 19 |
4 | 68 |
5 | 255 |
6 | 989 |
7 | 3955 |
8 | 16147 |
9 | 67057 |
10 | 282495 |
11 | 1203909 |
12 | 5180147 |
13 | 22480686 |
14 | 98268169 |
15 | 432231388 |
16 | 1911944862 |
17 | 8499084865 |
18 | 37945861008 |
19 | 170096408313 |
20 | 765203667592 |
21 | 3453498192794 |
22 | 15632819897677 |
23 | 70956387986424 |
24 | 322865559744975 |
25 | 1472499460157086 |
26 | 6729929928075598 |
27 | 30818993591307189 |
[1,2,6,19,68,255,989,3955,16147,67057,282495, 1203909,5180147,22480686,98268169,432231388, 1911944862,8499084865,37945861008,170096408313, 765203667592,3453498192794,15632819897677, 70956387986424,322865559744975,1472499460157086, 6729929928075598,30818993591307189] |