n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 3 |
4 | 7 |
5 | 16 |
6 | 43 |
7 | 117 |
8 | 330 |
9 | 935 |
10 | 2667 |
11 | 7616 |
12 | 21775 |
13 | 62273 |
14 | 178130 |
15 | 509563 |
16 | 1457727 |
17 | 4170224 |
18 | 11930147 |
19 | 34129757 |
20 | 97638522 |
21 | 279324735 |
22 | 799093699 |
23 | 2286051744 |
24 | 6539949991 |
25 | 18709526921 |
26 | 53524323778 |
27 | 153122698291 |
28 | 438054310967 |
[1,2,3,7,16,43,117,330,935,2667,7616,21775,62273, 178130,509563,1457727,4170224,11930147,34129757, 97638522,279324735,799093699,2286051744, 6539949991,18709526921,53524323778,153122698291, 438054310967] |