n | a(n) |
---|---|
0 | 4 |
1 | 9 |
2 | 20 |
3 | 45 |
4 | 101 |
5 | 227 |
6 | 510 |
7 | 1146 |
8 | 2575 |
9 | 5786 |
10 | 13001 |
11 | 29213 |
12 | 65641 |
13 | 147494 |
14 | 331416 |
15 | 744685 |
16 | 1673292 |
17 | 3759853 |
18 | 8448313 |
19 | 18983187 |
20 | 42654834 |
21 | 95844542 |
22 | 215360731 |
23 | 483911170 |
24 | 1087338529 |
25 | 2443227497 |
26 | 5489882353 |
27 | 12335653674 |
28 | 27717962204 |
[4,9,20,45,101,227,510,1146,2575,5786,13001,29213, 65641,147494,331416,744685,1673292,3759853, 8448313,18983187,42654834,95844542,215360731, 483911170,1087338529,2443227497,5489882353, 12335653674,27717962204] |