n | a(n) |
---|---|
0 | 2 |
1 | 7 |
2 | 20 |
3 | 57 |
4 | 158 |
5 | 431 |
6 | 1160 |
7 | 3089 |
8 | 8154 |
9 | 21367 |
10 | 55644 |
11 | 144137 |
12 | 371638 |
13 | 954335 |
14 | 2441872 |
15 | 6228129 |
16 | 15839794 |
17 | 40181095 |
18 | 101690404 |
19 | 256812121 |
20 | 647303502 |
21 | 1628647055 |
22 | 4091042328 |
23 | 10260849073 |
24 | 25699419914 |
25 | 64283165143 |
26 | 160599382124 |
27 | 400772669481 |
28 | 999059833190 |
[2,7,20,57,158,431,1160,3089,8154,21367,55644, 144137,371638,954335,2441872,6228129,15839794, 40181095,101690404,256812121,647303502,1628647055, 4091042328,10260849073,25699419914,64283165143, 160599382124,400772669481,999059833190] |