n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 28 |
3 | 226 |
4 | 1940 |
5 | 17214 |
6 | 155914 |
7 | 1432106 |
8 | 13289076 |
9 | 124276528 |
10 | 1169346298 |
11 | 11057293526 |
12 | 104986087178 |
13 | 1000248093420 |
14 | 9557756114130 |
15 | 91559051752596 |
16 | 879027678226452 |
17 | 8455595252761536 |
18 | 81476137225450096 |
19 | 786286875175380088 |
20 | 7598503022428758570 |
[1,4,28,226,1940,17214,155914,1432106,13289076, 124276528,1169346298,11057293526,104986087178, 1000248093420,9557756114130,91559051752596, 879027678226452,8455595252761536, 81476137225450096,786286875175380088, 7598503022428758570] |