n | a(n) |
---|---|
0 | 4 |
1 | 15 |
2 | 67 |
3 | 322 |
4 | 1657 |
5 | 9089 |
6 | 52922 |
7 | 325869 |
8 | 2114719 |
9 | 14418716 |
10 | 103004851 |
11 | 769052061 |
12 | 5987339748 |
13 | 48506099635 |
14 | 408157244967 |
15 | 3561086589202 |
16 | 32164670915029 |
17 | 300324194090773 |
18 | 2894932531218482 |
19 | 28773297907499129 |
[4,15,67,322,1657,9089,52922,325869,2114719, 14418716,103004851,769052061,5987339748, 48506099635,408157244967,3561086589202, 32164670915029,300324194090773,2894932531218482, 28773297907499129] |