n | a(n) |
---|---|
1 | 4 |
2 | 25 |
3 | 98 |
4 | 418 |
5 | 1862 |
6 | 8007 |
7 | 34539 |
8 | 149808 |
9 | 648436 |
10 | 2805250 |
11 | 12142877 |
12 | 52558637 |
13 | 227471330 |
14 | 984523558 |
15 | 4261166714 |
16 | 18442796291 |
17 | 79822557139 |
18 | 345481774068 |
19 | 1495286247768 |
20 | 6471776351478 |
21 | 28010620722521 |
22 | 121233307002413 |
[4,25,98,418,1862,8007,34539,149808,648436, 2805250,12142877,52558637,227471330,984523558, 4261166714,18442796291,79822557139,345481774068, 1495286247768,6471776351478,28010620722521, 121233307002413] |