n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 12 |
4 | 39 |
5 | 131 |
6 | 444 |
7 | 1516 |
8 | 5195 |
9 | 17847 |
10 | 61424 |
11 | 211672 |
12 | 730119 |
13 | 2520091 |
14 | 8702628 |
15 | 30063396 |
16 | 103881123 |
17 | 359017439 |
18 | 1240945016 |
19 | 4289745552 |
20 | 14829991071 |
21 | 51271047939 |
22 | 177263517036 |
23 | 612883590684 |
24 | 2119068084731 |
25 | 7326858673287 |
[1,4,12,39,131,444,1516,5195,17847,61424,211672, 730119,2520091,8702628,30063396,103881123, 359017439,1240945016,4289745552,14829991071, 51271047939,177263517036,612883590684, 2119068084731,7326858673287] |