n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 26 |
3 | 174 |
4 | 1231 |
5 | 8899 |
6 | 65492 |
7 | 487646 |
8 | 3664123 |
9 | 27723979 |
10 | 210946444 |
11 | 1612394958 |
12 | 12371547879 |
13 | 95230159650 |
14 | 735060394986 |
15 | 5687343753535 |
16 | 44096482961189 |
17 | 342530654187820 |
18 | 2665058975987628 |
19 | 20765913987073659 |
20 | 162019898098364055 |
21 | 1265622208055843635 |
[1,4,26,174,1231,8899,65492,487646,3664123, 27723979,210946444,1612394958,12371547879, 95230159650,735060394986,5687343753535, 44096482961189,342530654187820,2665058975987628, 20765913987073659,162019898098364055, 1265622208055843635] |