n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 16 |
3 | 63 |
4 | 248 |
5 | 976 |
6 | 3841 |
7 | 15116 |
8 | 59488 |
9 | 234111 |
10 | 921328 |
11 | 3625824 |
12 | 14269185 |
13 | 56155412 |
14 | 220995824 |
15 | 869714111 |
16 | 3422701032 |
17 | 13469808304 |
18 | 53009519105 |
19 | 208615375388 |
20 | 820991693248 |
21 | 3230957253887 |
22 | 12715213640160 |
23 | 50039862867392 |
[1,4,16,63,248,976,3841,15116,59488,234111,921328, 3625824,14269185,56155412,220995824,869714111, 3422701032,13469808304,53009519105,208615375388, 820991693248,3230957253887,12715213640160, 50039862867392] |