n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 26 |
4 | 76 |
5 | 222 |
6 | 648 |
7 | 1892 |
8 | 5524 |
9 | 16128 |
10 | 47088 |
11 | 137480 |
12 | 401392 |
13 | 1171920 |
14 | 3421584 |
15 | 9989792 |
16 | 29166592 |
17 | 85155936 |
18 | 248624640 |
19 | 725894336 |
20 | 2119349824 |
21 | 6187737600 |
22 | 18065963520 |
23 | 52746101888 |
24 | 153999606016 |
25 | 449623342848 |
26 | 1312738101504 |
27 | 3832722100736 |
28 | 11190167090176 |
29 | 32671254584832 |
[1,3,9,26,76,222,648,1892,5524,16128,47088,137480, 401392,1171920,3421584,9989792,29166592,85155936, 248624640,725894336,2119349824,6187737600, 18065963520,52746101888,153999606016,449623342848, 1312738101504,3832722100736,11190167090176, 32671254584832] |