n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 4 |
4 | 5 |
5 | 6 |
6 | 142 |
7 | 428 |
8 | 1269 |
9 | 3874 |
10 | 20336 |
11 | 114522 |
12 | 429002 |
13 | 1743184 |
14 | 6456192 |
15 | 23749014 |
16 | 93997909 |
17 | 368890906 |
18 | 1122546076 |
19 | 4496925530 |
20 | 17437145160 |
21 | 76147395524 |
22 | 310155556998 |
23 | 1417665712388 |
24 | 5528899930962 |
25 | 21923449788406 |
26 | 82833896451112 |
27 | 347234278501138 |
[1,1,1,4,5,6,142,428,1269,3874,20336,114522, 429002,1743184,6456192,23749014,93997909, 368890906,1122546076,4496925530,17437145160, 76147395524,310155556998,1417665712388, 5528899930962,21923449788406,82833896451112, 347234278501138] |