n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 33 |
3 | 146 |
4 | 588 |
5 | 2160 |
6 | 7459 |
7 | 24354 |
8 | 76071 |
9 | 228420 |
10 | 663177 |
11 | 1868220 |
12 | 5124224 |
13 | 13718748 |
14 | 35932278 |
15 | 92242982 |
16 | 232473006 |
17 | 575971494 |
18 | 1404600837 |
19 | 3375138816 |
20 | 7998932769 |
21 | 18712911214 |
22 | 43246451181 |
23 | 98799885342 |
24 | 223269183076 |
25 | 499357990254 |
26 | 1105934610042 |
[1,6,33,146,588,2160,7459,24354,76071,228420, 663177,1868220,5124224,13718748,35932278,92242982, 232473006,575971494,1404600837,3375138816, 7998932769,18712911214,43246451181,98799885342, 223269183076,499357990254,1105934610042] |