n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 17 |
3 | 76 |
4 | 361 |
5 | 1844 |
6 | 10321 |
7 | 64348 |
8 | 453329 |
9 | 3619684 |
10 | 32666161 |
11 | 329434604 |
12 | 3677682937 |
13 | 44901581716 |
14 | 595567550321 |
15 | 8505627039484 |
16 | 130307878338721 |
17 | 2126927187154628 |
18 | 36912563369550289 |
19 | 677277819029706124 |
[1,4,17,76,361,1844,10321,64348,453329,3619684, 32666161,329434604,3677682937,44901581716, 595567550321,8505627039484,130307878338721, 2126927187154628,36912563369550289, 677277819029706124] |