n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 31 |
3 | 281 |
4 | 2101 |
5 | 14851 |
6 | 102961 |
7 | 708761 |
8 | 4865911 |
9 | 33372361 |
10 | 228792301 |
11 | 1568309051 |
12 | 10749725281 |
13 | 73680695281 |
14 | 505017569551 |
15 | 3461448647801 |
16 | 23725139605861 |
17 | 162614572159411 |
18 | 1114576979567761 |
19 | 7639424583421961 |
20 | 52361395886149351 |
[1,1,31,281,2101,14851,102961,708761,4865911, 33372361,228792301,1568309051,10749725281, 73680695281,505017569551,3461448647801, 23725139605861,162614572159411,1114576979567761, 7639424583421961,52361395886149351] |