n | a(n) |
---|---|
1 | 4 |
2 | 6 |
3 | 14 |
4 | 28 |
5 | 56 |
6 | 150 |
7 | 360 |
8 | 828 |
9 | 1906 |
10 | 4628 |
11 | 10972 |
12 | 25850 |
13 | 60948 |
14 | 145152 |
15 | 343870 |
16 | 814072 |
17 | 1927632 |
18 | 4573086 |
19 | 10836712 |
20 | 25678860 |
21 | 60851842 |
22 | 144253956 |
23 | 341881772 |
24 | 810275098 |
25 | 1920403380 |
26 | 4551789280 |
27 | 10788216718 |
28 | 25569422984 |
29 | 60602792000 |
[4,6,14,28,56,150,360,828,1906,4628,10972,25850, 60948,145152,343870,814072,1927632,4573086, 10836712,25678860,60851842,144253956,341881772, 810275098,1920403380,4551789280,10788216718, 25569422984,60602792000] |