n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 18 |
3 | 118 |
4 | 813 |
5 | 5799 |
6 | 42470 |
7 | 317637 |
8 | 2416671 |
9 | 18649874 |
10 | 145655292 |
11 | 1149199212 |
12 | 9146686605 |
13 | 73354982763 |
14 | 592217363334 |
15 | 4809250320023 |
16 | 39258457746069 |
17 | 321964620209940 |
18 | 2651536017682988 |
19 | 21919266484180533 |
20 | 181820251665093357 |
[1,3,18,118,813,5799,42470,317637,2416671, 18649874,145655292,1149199212,9146686605, 73354982763,592217363334,4809250320023, 39258457746069,321964620209940,2651536017682988, 21919266484180533,181820251665093357] |