n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 10 |
3 | 67 |
4 | 502 |
5 | 4045 |
6 | 34279 |
7 | 301232 |
8 | 2720266 |
9 | 25091431 |
10 | 235394601 |
11 | 2239139980 |
12 | 21546299491 |
13 | 209361514219 |
14 | 2051379996574 |
15 | 20245794958408 |
16 | 201079938971546 |
17 | 2008276118393320 |
18 | 20157131084034349 |
19 | 203215717750220949 |
20 | 2056913539436637829 |
[1,2,10,67,502,4045,34279,301232,2720266,25091431, 235394601,2239139980,21546299491,209361514219, 2051379996574,20245794958408,201079938971546, 2008276118393320,20157131084034349, 203215717750220949,2056913539436637829] |