n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | 7 |
4 | 24 |
5 | 41 |
6 | 140 |
7 | 239 |
8 | 816 |
9 | 1393 |
10 | 4756 |
11 | 8119 |
12 | 27720 |
13 | 47321 |
14 | 161564 |
15 | 275807 |
16 | 941664 |
17 | 1607521 |
18 | 5488420 |
19 | 9369319 |
20 | 31988856 |
21 | 54608393 |
22 | 186444716 |
23 | 318281039 |
24 | 1086679440 |
25 | 1855077841 |
26 | 6333631924 |
27 | 10812186007 |
28 | 36915112104 |
29 | 63018038201 |
30 | 215157040700 |
[0,1,4,7,24,41,140,239,816,1393,4756,8119,27720, 47321,161564,275807,941664,1607521,5488420, 9369319,31988856,54608393,186444716,318281039, 1086679440,1855077841,6333631924,10812186007, 36915112104,63018038201,215157040700] |