n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 14 |
3 | 41 |
4 | 122 |
5 | 364 |
6 | 1093 |
7 | 3280 |
8 | 9842 |
9 | 29525 |
10 | 88574 |
11 | 265720 |
12 | 797161 |
13 | 2391484 |
14 | 7174454 |
15 | 21523361 |
16 | 64570082 |
17 | 193710244 |
18 | 581130733 |
19 | 1743392200 |
20 | 5230176602 |
21 | 15690529805 |
22 | 47071589414 |
23 | 141214768240 |
24 | 423644304721 |
[1,4,14,41,122,364,1093,3280,9842,29525,88574, 265720,797161,2391484,7174454,21523361,64570082, 193710244,581130733,1743392200,5230176602, 15690529805,47071589414,141214768240,423644304721] |