n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 14 |
3 | 46 |
4 | 150 |
5 | 494 |
6 | 1652 |
7 | 5618 |
8 | 19430 |
9 | 68302 |
10 | 243804 |
11 | 882578 |
12 | 3235596 |
13 | 11994922 |
14 | 44899568 |
15 | 169466426 |
16 | 644127110 |
17 | 2462746382 |
18 | 9462555788 |
19 | 36507525266 |
20 | 141333313220 |
21 | 548718227642 |
22 | 2135480023328 |
23 | 8327573906426 |
24 | 32530033219580 |
[1,4,14,46,150,494,1652,5618,19430,68302,243804, 882578,3235596,11994922,44899568,169466426, 644127110,2462746382,9462555788,36507525266, 141333313220,548718227642,2135480023328, 8327573906426,32530033219580] |