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n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 19 |
4 | 69 |
5 | 263 |
6 | 1044 |
7 | 4240 |
8 | 17595 |
9 | 74391 |
10 | 318493 |
11 | 1378895 |
12 | 6022039 |
13 | 26520440 |
14 | 117549906 |
15 | 524068965 |
16 | 2348103782 |
17 | 10568464412 |
18 | 47754218422 |
19 | 216537083286 |
20 | 984983798215 |
21 | 4493317804295 |
22 | 20550859759855 |
23 | 94213221969645 |
24 | 432845203438126 |
25 | 1992563341419802 |
26 | 9189311952508953 |
27 | 42450573153408853 |
[1,2,6,19,69,263,1044,4240,17595,74391,318493, 1378895,6022039,26520440,117549906,524068965, 2348103782,10568464412,47754218422,216537083286, 984983798215,4493317804295,20550859759855, 94213221969645,432845203438126,1992563341419802, 9189311952508953,42450573153408853] |