n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 14 |
4 | 48 |
5 | 165 |
6 | 571 |
7 | 1988 |
8 | 6953 |
9 | 24396 |
10 | 85786 |
11 | 302104 |
12 | 1064945 |
13 | 3756519 |
14 | 13256712 |
15 | 46796545 |
16 | 165225380 |
17 | 583440086 |
18 | 2060408640 |
19 | 7276716445 |
20 | 25700060995 |
21 | 90770326604 |
22 | 320598127113 |
23 | 1132355884236 |
24 | 3999522488002 |
[1,4,14,48,165,571,1988,6953,24396,85786,302104, 1064945,3756519,13256712,46796545,165225380, 583440086,2060408640,7276716445,25700060995, 90770326604,320598127113,1132355884236, 3999522488002] |