n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 10 |
3 | 23 |
4 | 51 |
5 | 108 |
6 | 223 |
7 | 454 |
8 | 917 |
9 | 1845 |
10 | 3702 |
11 | 7417 |
12 | 14848 |
13 | 29711 |
14 | 59438 |
15 | 118893 |
16 | 237804 |
17 | 475627 |
18 | 951274 |
19 | 1902569 |
20 | 3805160 |
21 | 7610344 |
22 | 15220713 |
23 | 30441452 |
24 | 60882931 |
25 | 121765890 |
26 | 243531809 |
27 | 487063648 |
[1,4,10,23,51,108,223,454,917,1845,3702,7417, 14848,29711,59438,118893,237804,475627,951274, 1902569,3805160,7610344,15220713,30441452, 60882931,121765890,243531809,487063648] |