n | a(n) |
---|---|
0 | 4 |
1 | 1 |
2 | 13 |
3 | 34 |
4 | 121 |
5 | 391 |
6 | 1300 |
7 | 4285 |
8 | 14161 |
9 | 46762 |
10 | 154453 |
11 | 510115 |
12 | 1684804 |
13 | 5564521 |
14 | 18378373 |
15 | 60699634 |
16 | 200477281 |
17 | 662131471 |
18 | 2186871700 |
19 | 7222746565 |
20 | 23855111401 |
21 | 78788080762 |
22 | 260219353693 |
23 | 859446141835 |
24 | 2838557779204 |
25 | 9375119479441 |
26 | 30963916217533 |
[4,1,13,34,121,391,1300,4285,14161,46762,154453, 510115,1684804,5564521,18378373,60699634, 200477281,662131471,2186871700,7222746565, 23855111401,78788080762,260219353693,859446141835, 2838557779204,9375119479441,30963916217533] |